>>246132
First and foremost: get a hiding spot. Even if it's a wooden box with a padlock for beneath your bed, it'll do – parents (mothers in particular) tend to have really really poor respect for boundaries and can be dense as fuck. Secure that shit and keep them away from it or they will find their way to it.
>buttplug/dildo with suction cup/double end dildo
Buttplugs are 90% passive, you just put them in and fap. Basic but good, and can be worn for a few hours if you lube enough. However, while it's hot and fun it's cumbersome to fuck yourself with a plug as they don't have suction cups and they're flared.
Dildos are awesome, but get one with balls or a flared base so you can't lose it inside of you. Fun to bounce on or even suck on, just be prepared to clean yourself and it thoroughly afterwards because silicone is the best choice but it has a habit of holding bad scents. I'd start with this one personally simply because it's the versatile option.
Stay away from double ended, bendy dildos unless you have a lot of self control. Push a little too far and that shit is getting lost inside you. I don't care how much double penetrating yourself with both ends stretches you, push just a little too far and your butt is swallowing it whole.
>brands/style/size
Find a balance between price and quality. As for size, go for medium if you're new to toys – small and you risk disappointment at high cost, large and you risk hurting yourself, whereas medium is a safe challange to work up to yet satisfying for a while once you make it.
>good sites
LoveHoney are decent enough, just stay away from their own branded stuff; like with supermarkets, I've found they're mostly just undercutting the competition with their cheaper, lesser-quality stuff for a bigger profit. That said they usually have deals and discounts on and they're incredibly discreet (boxes are normal brown box parcels, and return address is under "LH Trading" iirc).
Highly recommend UberKinky, especially as they do lots of fetish stuff too. However they're UK based so international shipping might be pricey. Again, highly discreet so it isn't a problem.
As for Amazon, I'd suggest against them because they're freaking Amazon. They're under no requirements to keep to confidential shipping: they're a company that deals in effectively everything, so they don't need standards for package privacy when most people are buying Xboxes and books from them. If you buy from a third party through Amazon, discretion will be down to them, and if they can't even run their own site you have no idea how reputible they are beyond probably fake reviews.
>TLDR – I'd say get a medium sized silicone dildo, that isn't too expensive, from a sale or with a voucher code at LoveHoney. They're discreet and cheap enough, and buying that kind of toy from them isn't too bad for a first try.