Is this Experience OP?
I’m the Network: You have +2 bonus on any rolls to negotiate with other Fungril, or to use your Fungril Network connection.
Fungril Network: You can make an Instinct Roll (12) to speak with others of your ancestry across any distance using your mycelial array.
It is not OP, though you aren’t required to restrict the Experience to 1 definition. Experiences are intended to be applied creatively, and GMs are encouraged to reward PCs for unconventional applications of Experiences.
For example, your Experience “I’m the Network”: You could apply your Experience to a conversation with Fungril, or to connect to the Fungril network. You could also say
“My familiarity with the interconnected web of Fungril communication gives me the insight needed to learn where the thieves’ guild headquarters is located, by talking to its members.”
Or
“This strange, futuristic technology is completely alien to us, but my experience with the Fungril Network allows me to recognise a few patterns within the system, aiding me in my attempts to shut do this security system.”
Or
“As I use my Nature’s Tongue to communicate with the local flora, I use my Experience to aid my conversation with the local fungi to determine when our quarry passed through here, and in what direction they went.”
They are intended to be incredibly versatile skills, that can be applied across numerous unconnected situations. The Hope cost for using them is what prevents them from being overpowered against the Adversaries or unbalanced between the PCs.
Thank you. Maybe you can help me with my concept. I’ll like to play a csi investigator/bounty hunter. He uses his Fungril Network a lot to help gather information and help track his quarry, thus I want to give him a bonus to connect to the network. But I do not what else to add, maybe bonus to talk with criminals and detect lies?
Hmm, I would recommend (if you haven’t already considered/chosen these options) the Slyborne background and perhaps the Syndicate Rogue class as options to emphasise your character concept.
As for additional Experience options, you could take the approach of doubling down on an area you are already skilled at OR you could try and branch out to an area you haven’t already covered.
For doubling down, try to avoid overlap with your other Experience, since you can only apply Experience once to a roll. For example, If you have the Slyborne community, you could pick something like “I Know These People” or “Immersed in Scum and Villainy”, something to suggest a familiarity with the criminal element, thereby allowing you to add a Experience Bonus to roll you also have advantage on.
If you want more variety, I would recommend using the experience to give your character more dimension and layers: Does your hardboiled detective box to stay in shape? “Bare Knuckle Brawler” might be useful in situations your character is unarmed, and also reflect their passtime; Is your character focused on protecting their community, and wants people to feel safe and secure? Something like “Reassuring Presence” would help them calm citizens, witnesses and victims and assure them you intend to find the culpret and bring them to justice. Is your detective a little morally dubious, perhaps even a dirty cop? “Quick Hands” might be a great way to show how they frequently steal and/or cheat to get their suspect, or maybe just to win at cards and get some rent money.
Every ability, feature, stat and such is an opportunity to add something to the story of your character, and thinking along those lines always helps me when it comes to character creation, so perhaps it will do the same for you. Hope I’ve been of any help! 
Thank you very much. You helped me a lot
My character is a Slyborn Fungril Bard Wordsmith. He works alongside a Syndicate Rogue who is his redemption journey.
I love Reassuring Presence very much, I think it will compliment very well with him, playing the good cop.
I’m glad to have helped! You seem to have a great concept for a character pairing, I hope the resulting escapades are fun!
I, too, had to reevaluate how I created my experiences for my PC’s. I started out so specific, that there were never opportunities to apply them during gameplay.
There is the other extreme as well, that the skill is so broad that you’ll feel guilty using it every time you roll, as least for me. The key is to find that sweet spot, where you can apply them often, but not every time.