Fill your buckets up with slime. Return to the bank chest and repeat the process for as many times as require (you need to have 1 bucket of slime per bone you'd like to shed). Take 14 bones of your choice and 14 pots and then teleport back to Ectofuntus via Ectophile
Go to the 1st level of the tower where you will find the Bonegrinder. Put your bones through the bonegrinder to collect bones and bonemeal in pots. Grind all of your bones and return to your bank. After you have finished grinding all your bones while collecting each the slime buckets , begin earning experience. Get 14 buckets of slime and 14 Bonemeal Pots and teleport to Ectofuntus. Worship Ectofuntus to receive prayer xp. In every worship you'll receive five Ectotokens which will be given by the his disciple NPC.
Another piece of equipment can be purchased from the mining guild. While you dig for new minerals, occasionally you'll find Unidentified Minerals. They can later be traded for any of the three types of Mining Gloves which are Superior, Regular and Expert ones. The final phase is called Mining Gloves works up to a Runite ore tier. Even though the Gloves don't give any bonus level, they will improve your leveling significantly. When wearing them, players have the possibility of not depleting the rock he mines when collecting resources. So if you get your ore from the vein that you are mining , there is still a chance that you can continue mining it. Basic gloves work up to an Gold tier and superior ones can go up to a Runite level. Expert gloves will let you get more efficient Amethyst mining as well.
Like in almost every skill , the best way to start training is by finishing quests. Since starting from scratch is boring and tedious, it is more enjoyable to complete quests and often faster. Two quests could easily bring you from the first level to level 32.