ive been flying electric for a couple of years and im flying a 4ch aerobatic plane successfully. how hard would it be for me to move on to nitro? what plane should i get if i do? What basic accessories do i need to own a nitro plane? thanks

Depends. Which aerobatic electric are you flying now? Glow planes typically have so much more power that if you're currently flying anything under a hot, geared 05, it'll surprise you.

Glow fuel, glow plug igniter, fuel pump, 12 volt battery & charger, 12 volt starter. (You can try using a "chicken stick" instead of the last two item, but it'll make things difficult.

Plane, radio gear and engine will depend.
Dennis-

yeah its the one in the pic. its a geared 300 but its pretty powerful. if i get a trainer it shouldnt be that hard should it?

No, it shouldn't be TOO hard, but you should still have someone with glow experience with you for the first couple of flights. All the extra power and speed could cause overload, and before you get ahead of the plane again, it could be in the dirt.

And please! Do NOT attempt to fly glow in a park, or anywhere else that has people around.
Dennis-

ok thanks. i fly at a club and it shouldnt be a problem getting an instructor

Glad you'll be at a club. With an instructor you'll be soloing on glow real quick.
Dennis-

the difference is, a lot more power, you can be up in the air in minutes as long as you have fuel, a lot more maintainance, a lot more moving parts to worry about, needle valves, cooling, carburation, eats up gas, clean up, looks better, thousands of engines to choose from, weight, and size.

The biggest problem you'll have is learning the dark art of tuning and running a glow engine. The one real, significant flight different you'll see is dealing with dead-stick landings. Keep in mind that if you close the throttle completely with a glow engine it may not be running when you open it back up.

You wanna' talk black arts? How about the black art of choosing a power package for an electric? Geared or DD, 6, 7 8, 10....24... 30, 32 cells, with which ESC? Brushed or brushless, and what the HECK are all those brushless motor designations? In eight years, and 30 or 40 planes, I've had a total of no more than 10 dead sticks. Once you learn the "black art" of turning two little valves and making an engine run properly, dead sticks are not an issue.

Oh, and yes, I fly electrics too.

Spaceclam,
I spend a LOT more time fiddling with my electrics to keep them maintained than I do my glow stuff. Cooling and weight is a bigger issue with electrics, and I've never really understood that "cleaning" issue. Sure the oily residue is a pain, but I've always had to clean the grass stains and stuff off my electrics too.
Dennis-

cool thanks. im familiar with engines because i have an glow powered car, so i think ill be fine. and unlike some of my friends, i actually like messing with engines and tuning and stuff like that.
so, mainly, just more power?
i want to get into glow planes because there are SO many to choose from and theyre big and ill bet theyre more fun

And I'll bet you're right!

Unless you keep breaking things, electronics shouldn't need any fiddling. They have no moving parts, no plugs to change, Don't have to worry about flooding it or dying at idle, and you don't really have to worry about your engine cutting out in mid flight either.