You are really lucky to have such winning after your first $1300, because most gamblers only have just very few luck to win again. If you still gamble and manage to win up to 100$-300$ then you should be proud of yourself because winning is very rare to see this days, although it depends on games we are playing and like most people often said that you can easily win through sports betting while some people keeps arguing that casino's are more easier to secure winning.
Apparently, sports bet is actually the easiest if you go by picking low odds or pick just only single bets it will help to secure winning but then, it requires higher amount to stake because games with low odds of 0.5- 2 odds is just like gaining back what you have spent. Let say you gamble with 10$ you will end up winning back $15- $20.
In my opinion, sports betting requires a fairly serious and constant involvement in the context to be successful. It is necessary to observe the teams, individual players, the financial turnover around sports events, and a bunch of other aspects. And then, yes, your chances of winning increase, because the decision to make a certain bet is based on something more than just poking a finger in the sky. And if a person does not understand the sport on which he is trying to win a bet, then this is exactly the same as a casino, because here only pure luck rules.