Through a couple of friends, I got a chance to participate in a one-shot campaign a while ago which I absolutely enjoyed. They did this for me and another person as a way to introduce us to D&D without any commitment. After liking it, they invited me to their campaign which I joined shortly after.
I created a necromancer wizard with a lawful evil alignment.
After getting used to the mechanics of the game and how it plays out, I really got to enjoy it. I still struggle a lot with actually role-playing though. My friends and I sometimes find ourselves into silly situations or just do goofy things that cause us to break out into laughter. The DM doesn't seem to mind and he himself cannot hold back from laughing at certain points.
It is probably fine for this to happen, but what I feel I lack in is finding composure and getting back to character. My wizard is lawful evil and I kind of based his creation on Dio from Jojo's (reference) who has a power seeking, narcissistic character. I usually start out fine when the session first starts, but when something happens that makes me laugh, I just cannot get back into roleplaying correctly. I am supposed to act aloof and evil, but as soon as I crack a smile I lose it.
In addition, I also have a hard time acting evil and lawful. How should someone (who is evil) act in a party that has good and neutral people in it? What can I do to play in character without disrupting the game or making it worse for others?
The solution I have found for now is that my introduction into the game was a result of the party breaking me out of a prison as a part of a quest. As a result, I pledged my loyalty despite them having different goals and ideals. My goal is to acquire power (political or economical) through any means necessary.
Any tips and advice would be appreciated!