Really depends on you. If your good with attention to detail, have a well stocked and clean work area and you are a practical sort of person, give it a go. You may find you need some special tools and a collection of O rings which cost a bit.
The first time you do it, it will take ages and be a fiddle, after that it will get easy. I used to do my Maverick forks.
Personally I do my fork lowers and simple seal change for shocks, but for my Talas 36’s I would send them off.
Even though I have a good workshop and even built an engine for racing in the Caterham 7 series, I just found the £100 cheap enough not to risk wasting a day buggering up my £900 forks.