Definitely check out Blackadder but I would highly recommend skipping the first series. They tried something, it really didn’t work and then they switched it up for the second series and absolutely nailed it.
In every instance where I know of people who watched 1 first, they are almost always put off by the silliness and don't continue.
I think BA2 will always be my absolute favourite of all as it was the first one I watched, and it also endeared me to the delightful characters that Miranda Richardson, Stephen Fry and Tony Robinson brought to the show. Only Hugh Lawrie in BA3 came close.
"Hand me the mail darling."