Can I see good results without a personal trainer?

I’m starting to be more healthy, decided to go to the gym, build muscle and lose weight.
However, I don’t have enough money to hire a personal trainer. So i just watch videos on m YouTube and try to copy and learn how to do the exercises properly. But i am anxious that i may not doing them correctly or missing something, will i see good results and build great amount of muscle without personal trainer?
Can I see good results without a personal trainer?
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