If you go for the route kaiza suggested you shouldn't bother too much about tactics. Don't know about this anymore but i think new players can choose a tactical orientation and start with a level 3 coach?
You might choose one direction (offense, normal, defense), get 3 or 4 experienced players based on that decision and start with the skill traning. With 3 experienced players you should be fine on the tactical level at start.
Even on higher leagues tactic trainings are only done by traning-camps (section training), which are not the best option to do at start since you need the money for stadium adaptation and said players. For additional money check out out the sponsor section however you should have an alter on the sidebar anyway
You can set the trainng by choosing (clicking) one skill, set the intensity (move the slider below) and click on save. Do that for each date again.
I hope that was helpful (and not too much filled up with errors)
greetings Kump