Where in Taiwan are you going to live? This will have quite a significant impact on your experience here.
There is a vibrant and welcoming gay/lesbian community in Taipei. Once you are here, visit some gay bars (e.g. the Red House – no need to specifically focus on lesbian-only), and you will quickly make friends who will help you navigate the community.
If you are shy and prefer not to go to a bar alone then use Tinder to make some friends. It really works much better if you post a picture, though. I certainly encourage you to do so – there is nothing to lose. Nobody is perfect, some swipe right and some swipe left. Just be yourself and you will be fine 