How to be more talkative and friendly?

I really want friends, but I rarely have motivation to talk. I have depression and social anxiety, so it’s difficult for me to find the courage and motivation to talk to others.

But I feel bad that people are stuck sitting with me since they don’t get to talk to anyone. I have a few people I really like but I just don’t have the energy to talk to them most days.

I know how to do small talk, but how do I talk more in general?

I’m in hs but I have no interest in any of the clubs or activities near me.