New user with pictures!

Hey everyone..long time smoker first time grower ha. Im pretty excited with my progress so far. I'm using a 400w hps and some random bag seeds. Been using nutes throughout the entire process. Right now they are in their 3rd week of flowering. I was wondering if you guy/girls could give me some advice on how i'm doing? Maybe if you can tell what strain these plants are? Also I tried searching the forums but to no luck..Should I trim at all or just let them be? Figured id post I tried searching so I don't get yelled at for not searching the threads. Check the pictures below and let me know what you think!

Strain? Not sure
Trim? Too late for that.

With that metal frame/table looking thing, it looks like a great place to scrog, You might try looking that up and try that on the next grow. Just search "SCRoG"

Nice looking plants.

I wouldn't trim.

I doubt anyone could identify the strain. But they look like mostly indica.

Thank you. Yea I was going to try SCRoG next time for that exact reason. Used to be shelving. Definitely enjoy coming home after work and checking on the plants progress ha. I didnt take a picture of it because it looks beat to hell but I made a carbon filter to eliminate the smell. Took a bucket..stuck thin pieces of wood criss crossing through the bucket with holes just beneath and covered the platform with charcoal. Stuck a fan on top of the bucket, so the air comes in through the holes up through the coal and out the top. Works pretty good but instead of mairjuana smell Sorta smells like charcoal ha. A fine substitute

Plants look good and healthy only suggestion watch your temps and humidity threw the flowering stage looks like area could get damp & as far as strains go honestly look kinda like my wos SB just smaller but i am sure thats not it GL.

yea thats one of my main worries. I sprayed the walls to try to keep some of the moisture out and check the humidity daily.

Strains, So many! Is it good? Thats all that matters unless you want to be a geneologist or botonist. So many mixed strains now as well. Your plants look healthyand green ( certainly enough Nitrogen). They don't appear to be very tall plants. I cut bottom branches throough flowering but not much each time and mainly only those branches that will not produce or produce well. My general rule is to take only dead or dying leaves or branches but lately been taking a bit more from the bottom.