Hey there,
I'm new to the forum experience. I would love any helpful tips on how to use forums properly in regards to my illustration work. I am currently in the the midst of rehashing my portfolio towards publishing work as in the past I have only received jobs that were handed to me. Am i better of posting progress in my portfolio and asking for advice as it progresses? or should i be dabbling in competitions, exercises and other discussions. Please go easy on what I imagine are somewhat ignorant questions... but I am well... ignorant when it comes to forums.

Welcome to the forums. to answer you question. Entering competitions are a great idea as well as the doing the other things you mentioned. Make your own blog to post your work. Be as active as possible. Give feedback to others and that's really it.