I've been paying people to make these for me for my machine shop but feel pretty sure I can figure out how to do it myself. What software would you recommend? TIA!

(And no this isn't an advertisement for our machine shop. I genuinely don't know what software to use to make these images to post on LinkedIn and elsewhere)

Canva?

Canva is probably easiest option

I typically use Adobe Indesign, but there may be better options. IDK, haven't really looked outside of my Adobe subscription.

Microsoft publisher if you already pay for office. Canva is a good option and reasonably cheap.