Seven foot, one piece spinning rod (or casting rod if you're savvy to using a casting reel) Line rated for 12# to 20# is ok.
Reel loaded with the same.
No wire leader. Tie the lure straight to the monofilament line.
Use the split ring or welded ring on the lure for line attachment.
Do not use any other swivel or snap.
Squid strips 1/2" wide by 1" 2" or 3" long is good.
Shrimp tails shelled is fine but it will cost you, whereas squid is cheap.
No 3 way swivel. Use a 1/2 oz to 3/4" oz egg sinker. Run the line through the sinker and tie on a swivel of appropriate size.....to this tie on a leader of about 18" 24" and a hook on the end of that.
Use size 1 or 1/0 single hook.
Wade out into the surf to knee high.....toss the lure as far as you can. Let sink for a count of 3 and then a slow retrieve so the lure wobbles rather than spins.
For bait, same thing except let sink to the bottom, reel in the slack, raise rod tip slightly so you're dragging and hopping the bait along the bottom with small twitches of the rod tip....stop.....let it set a couple of seconds.....repeat all the way back in.
Game fish like the bait to move rather than soak on the bottom.
A biter will often feel like a tap tap on the rod tip....set the hook when you feel that.
Look for sandy areas that are near some rocks....much better chances there than pure flat sandy bottom.
All fish like some sort of structure to hide around.....find that structure and you will find the fish.
This could be quick drop off, a trench, a raised sand bar that drops into deeper water, weeds, rocks and kelp or seaweed.
Look for an area that the receding water makes rips or fast flow back into the open water.....fish along those edges.
Sorry I don't know the specific fish species for Manzanillo.
Best to ask a local you happen to come across.
Good luck to you..no better way to relax and lull away a morning.