Marci

I would recommend either an imac or the Mac mini.
 
however, DON'T buy an iMac with ONLY a platter-based hard drive inside. TOO SLOW. You are going to be very VERY unhappy if you get one of these!

Get a fusion drive instead, even the 1tb fusion will be better.
The 256gb SSD (not sure if that option is offered on a 21" iMac) is best.
Don't let anyone tell you that "it's not large enough" You can add an external USB3 drive for project storage if needed, it won't slow you down at all.
 

thanks everyone, a found a strategy, i will buy an older (2016/17) mac and a matx mini gaming pc, i dont need to run gta at 4k 60fps, just to it run, so i can easily fit into the budget, thank you guys for helping me out, it is my first time on any forum, im enjoying it now

As a TOTALLY not biased person i suggest you don't get a computer from apple, unless you SPECIFICALLY need it for software you have to use that only runs on iOS ;). You pay a ridiculous amount of money for just the apple logo on it.

you dont play games on a mac.
Almost any mac (2015+ (i think? my sister's mac does that atleast)) will run minecraft, but GTA V? I think you have to high hopes for a macbook here
 
Your english is really good, no need to be sorry there.
I think any mac (apart from an imac? im not sure) can be plugged into a monitor with thunderbolt connector.
 
Also Welcome to the forums!

you can use an iMac with an external display too. 
 
i played Minecraft on a 2006 budget macbook with intel GMA 950 graphics and it ran it. not well, but it was playable  
 
indeed. it's what i do as well. my Mac is my daily machine and i have a pc for games. 

Gaming on a mac is just not a good idea. Just do as others do. Use a separate computer for gaming as that will be cheaper than any mac based solution and perform far better for the price.