Welcome to the game!
First advice: be patient!
Second: use the forum search for any question.
For further informations start here:
Third: to answer your specific questions (mostly already well answered): as @Chadmo and @Radar1 said, continue training your 3*, 3-5 of each color and their costumes. Until then I wouldn’t pull with gems. Your 3* will need enough time and you will have to expand your capacities.
Fourth: Alliances are also happy to accept beginners. Search the ingame chat or here:
