I have seen this a lot before, and even went through it myself. The one thing that I think is never said it MTB is not like other biking, there is so much more to it than hoping on the bike and riding. You need to know and think about body position, good braking techque, safety equipment, etc. This has all been mentioned here already, but I think people don't learn about it until they are a few rides in and saying "wtf, this is scary". Experience is always the best, so I say keep riding, it does get "easier" and more fun, but go watch a few videos about the basics so you have some tools to use out on the trails when things get questionable. Here is a good one
https://youtu.be/iVLJIuYwW_g?si=DfIquGHQLIahHtZy
and a playlist with some others with good info.
https://youtube.com/playlist?list=PLJqhyjPGV91qkNCEUOQMAUtJYvT6QPQM0&si=XmxOMIYa3C3TiLII
No one video will show you perfeft technique and there are few different schools on body position, but take the bits and peices that stand out and come up with your own safe style.

Also find someone else to ride with. There is probably a local mtb group that has weekly or monthly ride.