Sometimes it's better to mention it...
In comms, I've had guys tell me that they're shy, or they've never done it before and they'll need me to take the lead. I tell them that I'm not the type to take the lead and maybe they should find someone else.
As I alluded to in my posts and as is included in the links earlier, the importance of doing your research on here is paramount, if he does that, he should hopefully know to avoid WGs like you.
Even so, just because you don't like taking the lead doesn't necessarily mean he'd have a bad time. Also, being new and nervous isn't exactly the same as needing to be led, nor does it necessarily mean they're shy. Indeed there are slight hints in the OP's posts:
Normally I have the "don't give a shit, get on with it" approach to new things and go for it
Also, your honesty is extremely rare. Most girls don't try to put off punters. For example, I often ask for "plenty of Deep French Kissing" during comms and it's very rare for a girl to be honest and say they don't offer that or to temper my expectations. It is much more common for them to say they do/fully agree to it and then only deliver FK or just closed mouth/lip kissing (and/or only do it fairly briefly/it's not plentiful like they agreed) - even with girls who are fairly well reviewed on here.