Thank you for your advice,
@junior74 @chrisb and
@Mark Bosko
More data about me: I'm an all-court player. I play with flatter shots than most people I play against, although I can use a bit more spin if necessary. I feel comfortable playing anywhere on the court, attacking the net or being back. I prefer offensive game. My weapon is the drive, although it's not great. My serve is usually reliable but not very strong. I use a 1hbh that could be more consistent. I tend to slice it if I see the ball is coming difficult, but I like to attack and open angles with my topspin BH.
As for your advice, I'll try to follow your tips. I'll probably lose anyways, but I'll have fun. I'm not the kind of player who yells at each mishit, although I'm quite competitive. My only "ritual" consists on bouncing twice or thrice the ball before serving in the same way. Well, I'll tell you later how it went!