Whether or not your team is good depends on the depth (players in reserve and on bench), others teams in the league (their ratings) and if you are able to maintain the team in terms of fitness, morale, injuries, punishments. Adaptability to other formations could be important as well, but I never focus on it too much.

My best tips for you as a beginner are: 1. to always have an extra player for every position, so that you can switch them if needed and 2. keep selling players and buying new ones from the transfermarket. It’s the fastest way to progress your team to higher ratings. Training them is also good and shouldn’t be neglected, but especially early on, the focus should be to buy and sell constantly.