Peeblesshire Sub-Aqua Club will provide your training equipment for pool use. The club has several sets of equipment including masks, snorkels, fins, weightbelts, bottles (cylinders) and bouyancy jackets. The use of these for pool training is free. However there is a small hire fee for use in open water. When you want to start buying your own equipment it is best to speak to any other members to get as much advice as possible. There are many different types of equipment and buying badly fitting or "the wrong type" of equipment can be expensive. You will see many different types of equipment and often other members will be willing to let you try some of their kit in the pool.
Then you are then in a better position to buy what suits your needs.