>>643027
FFSPX (or at least its priests) may definitely (although I don't know if there is any official judgement on this) be schismatic, I would be more wary.
OP, besides FSSPX there are other traditional Catholic societies, which are in full communion with Rome, you can safely go there. FSSP is the most well-known one, they broke out of FSSPX to be within the Church, you can try it. And besides such societies, many parishes will have Tridentine Mass even if they aren't associated with any traditionalist society.
And if you don't find any such parish nearby, then remember, NO Mass is absolutely valid and licit. Maybe not as beautiful, but not heretical or anything like this.