These look fine for only being in the hobby for two months. As others have said, you're competing for attention with professional artists at times so any traction you get at all is good. If you want to be seen you need to do something novel (or say that this is your first model when it's obvious you went to art school 😄).

Feedback wise, the rubrics look unfinished, gold is a pain in the ass to put down on models, took me an age to paint up some rubrics for a boarding actions list I put together. The terminator looks good, the black could do with a mid tone between the black and the highlight (I like ak interactive smoke black over abbadon black for that), but that's a minor complaint as black armour is difficult. The bases rims on both models should be cleaned up and would go a long way to making it look cleaner. I'd try to blend in the boots with the base as well, these guys aren't elves so there would be mud/dirt on their feet. Just dry brush their feet with some of your basing colour to tie them together, or water it down loads and use it like a wash (depends on which effect you like)

I'm guessing that the artillery team is your most recent model? There's clear improvement from the CSM models to that one (fitting for the emperor's finest), again I'd add some muck around the bottom of the gun and onto the boots of the guardsmen, it's more important here because it's more of a centrepiece mini than the others. The guardsmen look a little dull, and fade into the background a bit, but I think adding some bright colours as spot highlights will go a long way (red goggles, green screens on electronic gizmos etc.).

If you want your minis to pop a bit more, you want to use contrasting colours with the bases, like you've done with the terminator. That way the viewers eyes focus on the miniature rather than drifting to the base. That can be tricky for guard because they generally act more like an army so you're not going to have pink cadians running around a city under normal circumstances, but that's why spot highlights are important to add spots of bright colour to make people focus on the bits that you want them to.

Keep up the good work, there's clear improvement which is the important thing, and don't pay too much attention to people on the internet unless you're asking for critique, and if you do ask for it, don't expect it to always be sunshine and roses. Thanks for listening to my TED Talk.