There are so many different instruments available with futures and each comes with certain information that must be known in order to trade an effective strategy. The following is what I think is needed:

Value of each contract
Depends on what you mean by 'value'. Is it the tick value? Yes very important factor for me. Contract value, as in notional value for each product? Not so much if you trade for speculation (to make money)
Margin requirement
Yep
Instrument expiry date
That's required if you hold your positions overnight. Also required when you just day trade for platforms such as NinjaTrader. On some other platform types if you day-trade it's not so much an issue as you are rolled over to the most active contract automatically
All in cost of a single trade (broker fees etc)
Yep
And then there are the things I don't know about yet, but that I need to know when choosing an instrument. Can you point out any other obvious things I need to be aware of? Also..would I get the above information from my broker?
Yes the broker will help with most of that.

The other thing is you would need to familiarise yourself with which product suits your style better. There are products that are very volatile (move very fast) and others that are very slow. If you have watched most Jigsaw videos as you said you would by now you should have an appreciation of the concept of volatility Vs. liquidity

There can be other aspects but initially who's starting is expected to trade in simulation only. That's a good starting point, and more questions become apparent when one has had a few dozen hours in front of the screen
Many thanks.

See above