It's new years! Year of the rabbit. No doubt you want to put on new years glasses such as these
>>412353682
on a bunny suit and have fun!
However, it's also going to be busy and it's not going to be an avatar you need for any other time, perfect opportunity to optimise it to help the new years experience! When making your avatar consider doing the following:
1. Open the FBX in blender on your main model
2. Cut down unneeded meshes and join stuff until you have just a face and everything else as two meshes.
3. If you use any blendshapes as ‘on by default’, set them as basis. (individually)
4. Export to unity, and in unity, change down your texture resolutions to 2k or less
5. Duplicate your animator controller and apply that to the model; delete layers you don't need. 

That's it; just a quick sweep of low effort/ good results optimizations. Let's have fun this new years!

Note: the following goes into detail on the procedures:
https://vrwiki.nexisonline.net/wiki/Avatar_Optimization
https://vrwiki.nexisonline.net/wiki/Booth_Optimization_example