I was an extract brewer for 10 years,went to partial mash for about 2 years
to learn the basics of using grain.Late last year I went to all grain and will never go back,still may do some partials.I am on my 5th all grain batch now and it is
improving rapidly with a lot of research on this board and abroad.For me the number one thing to do is be organized on brew day.My first batch was a complete nightmare and the beer came out BAD,mistakes with equipment,
missing temps,not sparging right,under pitching you name it,it happened.I`ve
got a handle on it now after 5 batches yesterday a made spotted cow clone
and everything finally went like clockwork.Used my first yeast starter,took off in
5 hours,hit all my temps and gravities were spot on.Practice and patience are a virtue.Go for it bro you wont go back to extract.
Just be organized. - peace-