I'm using a Grex Tritium side feed after using an old style double action and a single action airbrush for decades. I'm left handed and for years, pre internet, finding an airbrush that would let you move the paint cup to the other side was a difficult to say the least. So when I decided to retire my old ones I got a trigger style Grex. It's very nice, feels solid in you hand, has some heft to it. The trigger system is adjustable just like a old double double action style, about as easy to clean as a double action. I like, it was a great investment. I was looking at the Iwata Neo TRN2 side feed but show the Grex. It's almost instinctual to use, point it at your target and pull the tigger. If you used an old style button on top airbrush it may take some getting used to but it fits comfortably in your hand and you don't have move your trigger finger in a weird, uncomfortable position to work the button on top. Literally point and shoot.

I have the same Grex as above but gravity feed and I never look back easy to use and clean,very well made,yon can change many different size needles and I even got the fan head and work very good also with that,I can’t recommend enough the grex brand,and for you in USA should be very easy to find