Greg Bernhardt said:
I've started to get back into chess. I never had any formal training and was never very good. A friend of mine has got me playing against him via a phone app a few times a week. What is a good basic strategy for me to use? Especially interested in early game. Thanks!
I wouldn't focus too much on openings as a beginner. There's no point spending weeks learning opening lines if a couple moves later you'll make a mistake that gets punished by the guy who spent those weeks learning basic tactics.
A roadmap, from the very start, would be
1. Make sure you know the rules.
2. Basic checkmates.
3. Opening principles (not specific openings, just the main principles).
4. Learn and practice tactics. Keep practicing tactics all the time.
5. Basic endgames.
6. Experiment with openings that may suit you. Don't learn specific lines yet, just take an overview and look at the ideas behind the openings.
7. Take a look at some basic strategy.
By then you should have enough experience and knowledge to figure out which openings suit you and would be meaningful to invest time in.
One thing that is important at every level, always have a plan. It may be the worst plan possible, it doesn't matter, just have one. Ask yourself when you are about to make a move: "if I had to convince someone that this move, in accordance with this plan, is objectively the best based on the position on the board, would I be able to do so?". If not, don't make it. If you end up losing the game and have played without a plan, then not only have you lost the game but you've learned nothing from it.