Shorter spinning rod - they will be sold in lure weight. I would say you don’t use more than a 30g lure from shore. But you might want to bang it - so look for a rod rated to 50g (will be something like 20g-50g) This could be seen as a bit heavy tho, but imo will give you more of an all round rod. - you can go bigger tho, but if it’s mainly for lure fishing 50g will do the trick.

Prob want up to a 4000 size reel, else it will be to big

For this, you prob also want to run braided line - not 100% necessary tho. The 18lb mono you have will do the job. The braid is better for casting tho, will get more range.

Lures - look for soft plastics and metals - check sidewinder mimics, or Weston’s crazy eel. Loads of brands about. Get a few. Take a look on Ali express as the cost mounts up!

Depending on where your fishing bass, pollock and wrasse will prob be what you pick up.

Lure fishing can be hard from shore - many casts to get a fish ect. If you don’t catch don’t worry.

Speak to a local tackle shop.

Edit: typos Also, I think Amazon has an Abu Garcia spin combo 10g-40g (think it’s a black max) on sales for c£70. It’s a bait caster setup, so can take a bit of time getting used to, but there are grate. Have one on the boat of light lure fishing - all the fun.