welcome to the forum
if you are a fast learner I might be asking you questions.. I got around 8 years ago a american tactical Nova liberty 22 from airguns of Arizona and a Omega trail charger.. I'd highly recommend skipping the tank altogether and getting the Omega trail charger, while you can probably find a few a lot less money.. this compressor just works, auto shutdown for what pressure you set for, built-in water trap, and you can run it off your car battery or 120 ac.. I have only screwed down the grease pot once a year.. fills the american tactical Nova liberty in just a couple minutes, notos takes longer to push in the probe and turn on than to fill.. it takes a good 5 minutes to fill my hatsan blitz 22..
I started back in my 20s with PCP guns and got out of them in less than 5 years, was very difficult to get the scb tank filled since I don't have a dive license and don't want to be underwater.. things are different now but I am absolutely happy with the trail charger..
good luck with your airgunning and you are welcome to pm me anytime you want to.. just click on my name and select start conversation.. it similar to email.. and pm message id be happy to give you my email and phone number of you want to text or call..
Mark Hooper