Fork are not that hard to do.
First, get a service manual, this will tell you what oil weight to use, what oil level, and the correct procedure to reassemble(and disassamble) them properly.
I did mine for the first time this winter, 2 month ago.
I needed a fork seal driver, and i build my own oil level tool using a seringue and a plastic hose.
Obviously you will need fork oil and fork seal too, it may be good to replace the fork bushing while you are at it, but it is more expensive and optionnal.