Hi,
Hopefully you will find that this is just a phase! My LO did the same thing around that age and stopped eating anything I had lovingly prepared in favour of jars or pouches. I just went with it TBH. As you say, try some of your food out of one of the jars!
As for finger foods, just try a small selection every day - no point stressing and making loads if he will just throw it.
Good Luck x