is it worth doing myself? if so how do i do it and where do i get supplies?
any help would be appreciated

I've done a carbon boom which I got for $200. It took about 3-4 hours of patient and careful scraping and cleaning, then the fiddly glueing.

Worth it I reckon for a carbon boom (usu about $1000 replacement) but not for an alloy boom - which usually are only good for a few seasons anyway.

Windsurf shops should sell repair kits which consist of the replacement rubbery grip and a tin of glue.

I just did one recently, a Loft carbon boom.
The grip starts to fall off them after a couple of seasons.

I think I only took about 2 hours of careful scraping and cleaning.

The kit I got was just a couple of rolls of eva grip.
I bought some Selleys contact adhesive and followed the directions.

Here is a useful article -
www.windvisions.com/regrip.html

It worked out really well. Even though I couldn't cut a straight line you'd never know.

<edit> I tried the trick of fixing a green garbage bag around the arms with some acetone in it and leaving it in the sun for a while (to get the old grip off) but it didn't work.
It may have worked had I cut the grip up before doing it. Idk.

the material here is called slice and comes in different color and thickness sometimes used to make thongs or flipflops..i use rubber cement to regrip