Herblore is a relatively quick skill but the combinations for making pots may be a bit confusing. Use (http://www.tip.it) to find out how to make certain potions. Also the store runs out quickly so again a pain lol.
*Will be bought at shop
*Tele to catherby. From here head east over ice mountain. Keep heading east until you reach Talvery, here the herblore store is located.
What to do:
*Make attack potions using guams, eye of newts, and vial of waters. To make a potion you have to use a vial of water on a herb, than use it on an ingredient. Once you make your attack potions sell them to the store. This way you will make a little profit and it clears your inventory fast. Now use the website I provided to find out what levels you need for certain potions and the ingredients to make them. I hope this guide helps and good luck