Good evening and welcome. I'm fairly new to the forum, too.
I've got just two weeks left for the PP to come through on my garden workshop and am using the time to model the construction drawings on Sketchup, (which gives me headaches at times!), but I find it useful to identify problems that an architect would be aware of in seconds.
I'm on a budget, too, and will be doing much myself, so we could learn from eachother as we go along. I've certainly learnt loads from the guys on this forum just by reading their posts - you know who you all are, thank you!