"You may want to have a shop do the charging part if not experienced with it."
Or take it to a state-licensed facility, if you live somewhere like Washington state, where it is now illegal to do any automotive air conditioning work unless it's done by a facility licensed by the state.
In Washington the local auto parts stores can no longer sell cans of R134 or even do-it-yourself recharge / top-off kits, and it can't be shipped to residential addresses. We can buy it out of state and bring it back across the state line in a personal vehicle, but I'm sure that is also somehow illegal, and it's illegal to do the work in my driveway or inside my garage.
Irritating. I have all the equipment to evacuate and service air conditioning, but I can't use it.
What's really stupid, the national marketing office of a national chain auto parts store I frequent makes the local store put up posters advertising supplies to "get your air conditioning ready for summer", but the store can't sell any of it.