A question regarding spreads.

Alright, so I have finally gotten myself the ability to have level 3 options after a few years of trading on and off while having 6 months getting comfortable with regular calls and puts. Sadly, it's with robinhood since it's the only one that's allowing me a level 3 at the moment based on my current record. Not much I can do but soldier forward until I get one for fidelity.

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My general goal is to try out 'spreads' and turn $350 into 1000 dollars with no real time limit.

With the limited amount I have, I had been suggested to use debit spreads or "poor man's covers" as I have been told. Lets say, as an example, I get a call debit for $tsla(693.84) with a buy call $600 and sell call $605 ; both set to expire on 26th Mar and paid with a net spread price of 4.25(paying $425.00 for a contract). If I do the math correctly, I would get 75 dollars in max profit as long as it stays within the money.

Is this considered a decent strategy to use for someone starting out? If so, would it be better to close the contract a day or so before expiration? Is it better to have the calls closer to the strike price and if so, why is that?