Also starting out, is it enough to have headphones for mixing ( I got Sennheiser HD 280 Pro) or should I get monitors? Any recommendations? Thanks! :)

Headphones should be fine for now. Remember the most important aspect of mixing is listening to your work on multiple speaker setups. Make a quick mix down, listen to it in a car, on laptop speakers, a stereo system, anything you can find. You'll find lots of issues that way. Write them down and then fix them when you get back to work.

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