How often should I check my SUV battery? Zaabeel owner asking

I bought my Nissan Patrol second hand about eight months ago, and the seller never told me when the battery was last changed. That has been bugging me, because a friend of mine got stranded last summer and said it was the worst afternoon of his year. I live near Zaabeel and park outside, so the car sits in the sun all day. Nothing is wrong right now. It starts fine, the lights are bright, and there are no warnings. But I would like to look after it before it fails, not after. I read a bit online and came across some Leading Varta 100Ah battery maintenance in Zaabeel, and it made me realise that a battery needs small checks, not just a swap when it dies. Now I want to ask people who know more than me. How often do you check yours, and what do you actually look at? Is it just the terminals for white powder, or is there more? Can I do it myself with a normal tool, or should a shop test it with a proper machine? I also wonder how long a big battery should last in this heat if you take care of it. Does parking in the shade really make a difference? And if I do a few short trips every day, does that wear it out faster? Another thing is cleaning. Is it safe to wipe the terminals at home, and what do you use? Also, when a shop tests it, what numbers should I ask about so I know it is really healthy? If you have a routine that works for you, please tell me what you do, how often, and how many years your battery lasted. Easy answers help me most.