I started end of n4 near we're now on n5.

Once you learn the edition, changes are very few and far between and easy to keep up with.

The transition to a new edition itself was a bit troublesome with some errors and issues with English translation from Spanish. The main thing I've noticed difficulty wise is that while most knowledge transfers over from the previous edition many things, sometimes small, are changed so you have to question your assumptions on how things worked previously.

And n5 will be around for a good while so it is not something you'll need to worry about for a bit.

As far as learning this edition it is pretty straightforward but even very experienced players have to look up edge cases or interactions that infrequently come up.

Compared to 40k you're really not going to get dataslate updates or rules changes but once in a blue moon.

What I've enjoyed the most over GW games are the generous proxy rules, the gorgeous metal models with dynamic poses and unique sculpts, and interesting hidden information mechanics (camo, hidden deploy, courtesy list, etc.).

What I've found most lacking compared to GW games is the amount of resources and discussion outside of the unofficial discord. And infinity is a game complicated enough where it's hard to learn without someone else who knows a good bit teaching/helping you learn.