Please don't bash me off the site, but I see a lot of people get hung up on this transition. It sort of like fishing with a bait caster vs a fly rod. You need to relearn some stuff, and will never "beat" the bow. The journey is part of the process.
Form is key, ALL great archers have great form. Even a casual form like Fred Asabell has a reproducible "T". So always include the form in whatever approach you are taking, and low poundage for practicing.
The other big thing is don't get hung up on filling some stereotype with your bow/style. If you love the bow, but want to be really accurate really fast... put a site on it (gasp!!!) Plenty of people with longbows/recurves have sights and even peeps and stabilizers. Look at all the bear bows from the 60's. People used to pay the factory to paint them and then drill and mount sites, now we are starting the paint off and throwing out the sites. The point isn't to get a site necessarily, but don't let it overwhelm you. I struggled a long time because I felt that a longbow meant instinctive and fast shooting. Now I playing with gap and split vision.
In your case, you could run a sight and even a peep for a few months. This will allow you to get used to establishing a draw at full poundage, a split finger or three under loose (please don't release an arrow, that is active motion and you'll pluck the string), learn to shoot a constant anchor without a back stop, and with a site you'll also develop some understanding on the holds involved with split/gap/instinctive. When you are ready for the next step, loose the peep, then the sight. Or keep em if you like em. If using a peep be sure that the peep fits you, not the other way around which leads to the wheelie bow head nuzzle.
Six years ago when I got heavy into the tradbows, I would have blown this off, but I also worried too much about preconceived ideas of what it meant to shoot a longbow.
Defiantly focus on the mechanics. Arne has been a great mentor to me, and his videos are excellent on explains the olympic style (BEST system) adapted to trad bows. Most compound friends I know were surprised how much there from improved just messing with my longbows for fun in deer camp. A stick and string will show you everything you mess up in your form. For me the big thing was PROPER back tension with shoulder rotation. I used the muscles was took a long time to quite using my bicep when drawing. Form Master is a great and simple device to use for this.
Sorry for the long rant, but remember the journey is yours, don't let it overwhelm you. The advice earlier in this post is all excellent and well intended.
If you like the mechanics side of this, Arne is great with olympic style as is Rod Jenkins.
Archery Anatomy is also great book on mechanics involved.