Aura
Without doing an official study it is hard to know hwat percentage of FFBs discriminate against BTs and what percentage of BTs get discriminated against. There is some discrimination by shidduchim, however if you will speak to Rabbis who know about the BT movements and Kiruv they will tell you that for shidduchim a BT should marry a BT because they will understand each other better. In this day and age there are enough BTs in either gender for them to find shidduchim.
There are many BTs out there that people dont even know that they are BTs. My advice to any BT is try not to stick out. I know the FFB world is very different than the world that a BT is used to and when they try to mainstream themselves they have many challenges. Just try your best to experience as much as you can. Daven in different types of shuls and try to meet Jews from different communities and try to speak to as many FFBs as you can so you get a better idea about the different types of Jews and the various things that go on in the Jewish world. Dont allow yourself to be an outsider.