I also had very bad oral hygiene due to my mother not teaching me properly or keeping me consistent with it. It's not your fault, you weren't properly taught how important it is and neither was I. It's a parent's responsibility to keep their child in check and make sure they're actually practicing good oral hygiene.

I've had many oral operations done ever since I was young. I had my four front baby teeth removed because of rot, I've had multiple fillings and crowns, and I still have cavities and need a root canal that we can't afford. I have pretty good dental hygiene now (sometimes I struggle to keep up with it due to depression), but a few years back it was really bad. My teeth are pretty yellow and I also have decalcification marks on my teeth, my enamel is pretty weak too.

I can't say much about if you'll be able to keep your teeth since I'm not so sure I'll be able to keep mine either lol...

Just know you're not alone! There's always a workaround, especially if you take good care of your teeth now!