Without artificial light and good ferts you will be lucky to yield 3 grams, on a windowsill you don't have much chance to be honest.

Greenhouse/Outdoor woud be better if you can't do it indoor.

Indoor you should be able to yield about an ounce per plant but I wouldn't really count on much more. For SCROG type grows it is a good bet though.

As you can't clone I would grow 1 batch for seeds - just pick best female and male(s) and pollenate. You should get hundreds of seeds which you can then have fun with all over

Strong light - good ferts - full sized pot to gow into = good yielding LR2