The training aid market points beginners at the wrong problem. It sells distance, because distance sells. Beginners do not have a distance problem. They have a contact problem, and contact comes from a repeatable low point.
What to buy first
Something that keeps your arms with your body
The single most common beginner fault is the arms working independently of the torso. It produces every miss at once: thin, heavy, left, right. Holding the arms to the chest turn removes most of them in one go. The Sync Band is the cheapest honest version of this, and it fits in a pocket.
Something that shows you the truth about setup
Beginners aim badly and cannot tell. A reference on the ground, or a mirror for putting, replaces guesswork with a picture. This is dull and it works.
A phone and a way to prop it up
Free, and better than most purchases. Film face on and down the line. You will see in one video what you have been guessing at for months.
What to ignore for now
- Speed trainers. Swinging faster with poor contact just spreads the misses wider.
- Wrist-angle gadgets. Lag is an output of good sequencing, not a thing to install first.
- Anything that swings for you. It teaches your body nothing.
- Weighted clubs. Useful later for feel and strength, not for learning contact.
How to use what you buy
Ten minutes, not an hour. Slow rehearsal swings with the aid on, then take it off and hit shots. Beginners improve fastest with short frequent sessions, because the change is a motor skill and motor skills are built by repetition spread over days, not crammed into one bucket of balls.
If you want the simplest possible starting point, the connection tier in arm connection trainers is where most beginners get the quickest visible change.