is 7% glycolic acid okay for beginners?

i bought it a while ago without doing too much research about the percentage, and i’ve been reading that beginners should start with 1-5% but i already have the 7% one. i’ve used it a few times with no issues but i don’t know if it’s a matter of long term usage that’s the issue? should i keep using it as long as it’s not irritating, or get a lower percentage one?