DIY a wall that was scraped and now has bits of paint and paster help?

I thought I was just going to scrape off the loose paint but it came off in shards. Most of it came off easily but some areas still have paint stuck there. I put paint stripper on the stuck paint parts and sanded. But it is still uneven. Worst of all, it looks like I am down to bare “plaster”. I was told “skimming” is the way to go. This means hiring a skimmer? What else can I do?

Could I also do a paint technique to hide it?