When you're ship is ready, go on https://edtools.cc/miner

Type in your current system and select Platinum

Go to the nearest destination on the list, scan the rings of the planet by using the detailed surface scanner, find the platinum overlap, fly into the middle of the overlap.

Wait for the pirates to scan you...

After they have, fire a prospector limpet at a rock, target the limpet, if the the platinum content is not on the list on the left, move on find another, when you have found a good rock, fire the mining lasers and the collector limpets, make sure to open your cargo hatch.

If you don't want anything else from a rock after you have mined it, go to your contacts and add the unwanted materials to your ignore list.

Repeat steps till cargo is full of platinum...

Now, head to the closest sell location which is next to the hotspot location on https://edtools.cc/miner.

Sell the platinum and repeat for CREDITSS