Gun range advice for beginner?

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Hello /k/, I live in a cucked country where I'm not allowed to shoot any handguns recreationally, but am now visiting another country and going to a shooting range tomorrow. I'm very excited and looking for any advice beyond the usual safety rules. I've only been to a range once before, where I shot a glock (50 rounds) and an AK47 (45 rounds). Tomorrow I will have an opportunity to try a wider selection, such as MP15, glock, beretta, TT, S&W 38 special, AK, CZ scorpion evo, mossberg shotgun and others. I have a limited budget, are there any recommendations how to spend my money there? (They charge per round) Should I start with small caliber and move on to larger ones progressively? Should I bother with a .22? Is there any dumb shit beginners do that I could avoid doing with prior knowledge gaind from you anons? In general, how do I make the most of my day? The next opportunity will not come very soon. What do?

>inb4 kys newfag