Striker fired pistols take some getting used to, especially, if you predominately shoot rifles with good triggers, revolvers, or single action hammer fired 1911 type handguns.
One of the best things I did to my Gen4 G17 was install a trigger kit in it. Striker fired pistols have a weird spongy and sometimes pretty heavy trigger. I don't exactly remember but I believe I used a ZEV trigger kit in mine but if you look up do it yourself Glock trigger job there are multiple youtube vids that'll walk you through DIY trigger jobs that'll improve your trigger nearly as well as a aftermarket kit will. It not only drops the trigger pull by about half but it drastically shortens the pull and makes them considerably more crisp taking a lot of that spongy feel out of it.
Even though I have a few I'm personally not a huge Glock fan but that doesn't mean they still aren't a good gun and they're a workhorse you can trust to go bang every time you pull the trigger.
Also, Glocks are extremely easy to disassemble and work on.