Thank you for your advice!
Now I have bought a good shooter and defenser on the position of SG, and also I'm trying to buy a talent PG with good passing and big range of shooting. Then I think a big guy with tough defensive function is necessary.
I do have enough patience to train these young talented players, and I really enjoy the process of building a young team with talents! Is that OK for me to buy several young players in different positions as I have taken the salary and the transition fee into account?