I agree that the money that you play with must not be important to your lifestyle, but going with the idea of losing is a little negative. Nor is it necessary. Sergiy will tell you to study AP. I will tell you to avoid long progressions. Instead of chasing your loss, increase the bet on the next target. If your bet selection is any good you will find that you cannot keep losing on a series of different targets.
If you have no idea of how to improve your bet selection, you are going to have to do a lot of study. Many published methods have merit. They fail through poor implementation. When you study a system don’t look at why it might win, but why it might loose.
One word of advice. Systems, generally have very simple methods of bet selection and rely on the progression for success. Strategies have more complex methods of selecting the bet, that do not rely on a long progression. You will find that all serious players use strategies rather than systems. If you are in doubt ASK. there are a number of strategy players who are quite willing to help.
Welcome to the forum, regards,
Harry