linuxnewbie can i run Solus on this old pc. if can which DE should i choose?
The best way to find out is to try it. Maybe start with the "live" .ISO file, and if that seems usable, go ahead and install it. The MATE DE is usually recommended as the best one for computers with limited performance.
No, I can't recommend a distro other than Solus. I'd have to lie.