I agree with AllTrails with the subscription. The star ratings aren’t very useful though - everything seems to have 4 1/2 stars. Sorting by popular can help, but that won’t help you find the best quiet trails.I have my own little website https://trailspotting.com where I rate NH trails as a single consistent voice, but so only have around 120 trails reviewed so far.

Also .. no need to wait until spring. Fall is great, and for winter all you need for most trails are some layers and microspikes. Winter hikes can be spectacular.

Consider going up with a group too. Facebook is a good place to find likeminded hikers who go already have a nose for the best trails.