No. If you don't use it regularly, there's a lot of commands to learn. It's not hard per se, but I wouldn't want to be judged on it within a few minutes of being introduced to it.
First of all there are just few command that you need to learn. and they are so easy and obvious that it's crazy. Second, it is an oxymoron, because if you claim that you are technical person, you should have no problem doing /help and reading the documentation. if you can't do that - you're not technical . Oxymoron.
Irssi will lift your nickname from the username. It may even come with freenode pre-configured.