First of all, don’t be anxious about this kind of thing. You need to decide first if you really just want to be friends or if you think it's okay to know if she's doing well. The two are different. If you just want to see her more, then you will definitely not be friends.

If you want to be friends, you must first be mentally clean. You are so pure that you just want to be friends. Only then can you convey it to the other party. The other party will naturally give you a chance if they know that you are sincere, unless you have hurt her before. .

There is no skill. This kind of thing cannot be accomplished in a day or two. I suggest you put it away for a few months and then take it out for reference. Don't contact her, wait a few months and then contact her via QQ. In this way, it will be easier for both parties to become friends while feeling unfamiliar yet familiar.