For a novice player, it is important to decide on the type of sport and the championship on which he will bet. There may be several such tournaments. But the more competitions you try to cover, the less time there will be for analysis. Because of this, the probability of accurate predictions in sports betting is reduced.
First of all, choose:
a sport in which you are well versed;
top championship;
several popular clubs.
The main task is to learn how to qualitatively analyze the balance of power in at least some matches. A superficial study of rivals at a distance leads to the drain of the bank.

What you need to Know about sports betting: attitude to gambling
When betting in bookmakers, you must understand your purpose and risks. If you treat betting as a way of earning money, be ready for full-fledged work with studying statistics, watching matches, tracking news, and so on.
Otherwise, treat betting in bookmakers as entertainment for which you will pay. After all, without systematic analytical work and good knowledge in sports, it is almost impossible to beat a bookmaker at a long distance.
There are three mistakes that can lead to huge problems:
Place bets if there are loans or other obligations.
Borrow money on a bet.
To put the possible income from the game into your budget.
Remember that even a series of failures should not become a financial or psychological problem for you. Otherwise it is better not to put.