Hello.
I didn't get a 99 skill for the longest time. If you want a simple one, I suggest trying one of the ones I have: Firemaking, Cooking, and Woodcutting. They are all easy skills that anyone can master, don't cost a lot, and once you get one of them out of the way, other 99s become easier. It just takes time to get a 99. If you put in time everyday, you'll get a 99 eventually.
You have a lot of quest points which is good. Quests are a great way to earn free exp for skills and get nice rewards that help with general game play. I see you've completed Tears of Guthix. If you want an easy way to train low level skills, the ToG D&D is your best bet. It's weekly, it's free exp, and it doesn't take much time.
If you have other questions, feel free to ask.
There are lots of helpful people on the forums who can assist you.