Start with the frame
A wire-frame spinnerbait carries its blades on an arm above a weighted hook, usually dressed with a skirt. An inline spinner carries a rotating blade around a straight shaft, with a hook behind the body. They both flash, but they do not pass through cover in the same way.
The wire arm helps a spinnerbait negotiate some wood and vegetation. It is still possible to hang one up. An exposed treble on an inline spinner is generally better suited to an open route or the edge of cover.
Blade shape gives you a starting clue
Long willow-shaped blades typically emphasize flash and offer less resistance than a broad Colorado-style blade of similar size. Rounder blades create more pull and help you feel a slower retrieve. Blade size, weight, and the whole lure design matter too.
You do not need a complete blade collection to begin. Pick a lure you can cast accurately and keep at the intended level; learn its slowest reliable working speed beside the bank.
Inline spinners: let the blade work
Start the blade with a short pull if necessary, then settle into a steady retrieve. A blade that turns needs less rod movement than many beginners give it. In current, direction matters: moving upstream, across, or downstream changes water flow past the blade.
For trout in moving water, an across-current cast can let the spinner swing through a seam. Keep it clear of the bottom and follow the lure with the rod. A quality swivel may help manage twist where appropriate, but first check that the whole lure is not tumbling.
A spinnerbait can swim at several levels
Bring it in promptly with a higher rod angle for a shallow path. Let it settle and slow the retrieve for a deeper one, while keeping the blades turning. Add a plastic trailer only when its extra profile or action serves a purpose; make sure it sits straight.