A punting phone is a must for many reasons. You can pick one up on ebay for a £10, remember you only need it to text and make phone calls.
I would advise you to stay away from Paisley, apart from Sticky Nicky who gets glowing reports, the standard of whore in the Paisley area is either some wee druggy, a Romanian skank who will have you out as quick as she can, or some Bait & Switch trap or probably both. I have been to 5 or 6 now in the area and have walked every time.
Have a look on the reviews section, for a first punt Erika, Horny Hottie, Analya, Gabrielle etc. there are many of them. Stay away from anything that has Romanian on the profile, and be wary of any other EE nationality. Go on AW find someone you like the look of and check them out on here.
Welcome to the fray and the best of fucking luck!