Yes, if you are completely new to the game, it might be a bit confusing in the beginning. But give it time, and you'll probably be completely hooked, like the rest of us
Your training schedule issue: I guess your club is semi-professional. So if your players aren't full-time footballers, they can't use full-time training schedules (they also need time to be carpenters, plumbers and busdrivers, lol)
Search the Tactics & Training section of this forum for part-time schedules.
When it comes to decide which players are better, and what role/position suits them best, your coaches can help you. Go to Player Name > Reports. If you have several coaches, you can select who to listen to in the drop-down menu (top, left). At this stage, you should probably listen to the coach with the best 'judge ability' stats.
These reports tell you what position and role suits your player best. And, even more helpful, they will present a list of players that can play the same position, ranked by abilities.
Note: reports are just a coach's or a scout's opinion. The better the reporter is at judging abilities (or potential, for scouting reports), the more accurate the report will be.
Getting good staff (coaches) is often quite hard in lower leagues. The physical side is the most important. Especially part-time players and staff do not have time for much specialised training.
If you are allowed to have two coaches: One should be good at the physical aspect, one on the technical. One should have good 'judging ability' stats (for the reports on own players) and one should have good 'motivation' skills (take his advice on team talks etc.). They should both be decent at 'dicipline' and 'determination'.
If your assistant manager (if you have one at a semi-professional club?) also have good tactical knowledge, it's a bonus. You can then listen to his advice during matches, and adjust tactics accordingly.
I hope this helps you in the first steps, but you still have a long way to go...
As I'm sure you will bump into lots of questions, you are welcome to send me a PM or something. I'm no oracle, but I love this game, and am happy to help as best I can.