Please don't! You don't know "lots" of ballet after 2-3 years of doing it, 2-3 years is still considered beginner level, and 3 years of consistent training is generally a minimum for starting pointe. Figure skating is not related to ballet, and won't help you.
Simply standing in pointe shoes without pain doesn't mean you'd be a prodigy at it, the pain of pointe comes from things like blisters, with the rubbing of your foot against the fabric as you do various exercises, or sore toes after the end of a long class/rehearsal. Although pointe isn't exactly comfortable, it shouldn't be painful, if it's painful, that's a sign something is wrong.
If you want to learn pointe, start taking regular ballet technique classes again, and wait until your teacher says you're ready. It's not going to be an easy or quick process, you need years of consistent training and the right strength before you're ready for pointe, but if you're only interested in pointe work, ballet isn't for you as even once en pointe, regular technique classes are still an integral part of ballet.
If you try and teach yourself pointe, you will end up injuring yourself. Maybe just a sprained ankle if you're lucky, but you could seriously injure yourself going up en pointe without being ready for it. Not to mention any technique you learn from videos will be poorly executed. Even professional dancers never practice on their own, because they know it's necessary to have a teacher there to correct your technique and help you improve.
I've been a ballet dancer for nearly 10 years, en pointe for 7