Oh, don't worry about it! This site can be very overwhelming at first.
The are two ways to submit a deviation to groups. The first is from the post itself. Go to your deviation, on the right hand side of the page, underneath 'more like this' 'download' and 'share' there should be a section called 'Featured in Groups:' Underneath that there is a button you can click called '+ Submit to a group' Click that. From there a new window will pop up in the middle of the page. Click the option that says 'type a group name' type in 'poeticalcondition' or whatever other group you may want to submit to, and hit 'check' This will bring up the group, from there you just need to choose a folder and hit 'submit'!
I hope that helps! If you have any other questions, feel free to ask!