No its all doable by you. However you either need to get her lifted or put the diving
kit on to see how bad it is.
This side of the pond a yard will pressur ewash her when they lift
her. Weed isn't a problem but barnacles
won't come off, thats down to you.
Once you have got her out you then need to see how rough the bottom is. If under the weed the previous coat is smooth then a good wash with freshwater and a HD scrubbing pad is all I use. If the bottom paint
is flaky, cracked, rough as old boots then you should think about taking it all off either by slurry or soda blasting, or scraping. However get her lifted and pressure washed first.
As to the painting, check with lots of other local boats what works and perhaps more importantly what doesn't and were to buy. Disposable coveralls and gloves, small gloss paint
roller and tray and away you go. Imulsion paint
foam rollers disolve in antifoul paint BTW so use gloss hairy ones.
Plan on replacing the anodes at the same time. After 4 years you may not have any left and this is an urgent job.