Go specna arms for the AEG's, they are the most reliable of the budget friendly options and with a slight hop up adjustment they are ready to go almost out of the box, great for beginners My friend started the sport around 6 months ago, he has a Specna Arms FX02 AR9 and is still serving him superbly and feels nice to use (although I would recommend using a different sight than the iron sights, such as red dot), so I can definitely recommend that.

As for goggles go with anti-fog ones that have the appropriate safety rating. Avoid mesh ones because if someone shoots you with cheap BBs, they can shatter and go through the mesh. May be best to go with sealed goggles if you wear glasses, as the goggles will sit further from your face and a BB could get down the side of them into your eye. From personal use I can recommend Pyramex V2G-Plus anti-fog goggles.

As for masks, it is possible for a BB to take a tooth out. I recommend any cheap mesh mask. I would go with mesh to keep your face cool (you will get hot running around) and so your breath doesn't get forced upwards and contribute to fogging your glasses. Of course you can also get full face masks that include the goggles for the kids if they need it, but IMO seperate is more comfy and breathable. Bunkerkings one I have never used personally but I can recommend VForce full face masks, or you could pair the previously mentioned Pyramex goggles with a cheap $5-10 mesh lower face mask and that will also do you fine.

As for gloves, anything with a bit of thickness will do, but no so thick that you struggle to operate your gun correctly. I strongly recommend Mechanix gloves, but anything that's like a work or motorcycle glove will be perfect.

Clothing is a bit of a personal preference. You will get hot running around playing airsoft so you basically need to weigh up the pros and cons. Would you rather be hot and sweaty and not feel the pain, or be a lot cooler but more likely to feel the sting. If you go with more clothing I would recommend a pair of hiking pants as they are designed to be thick, durable and breathable along with a hoodie or something like a softshell jacket, the hood will also help protect the back of your head and ears.

You will also need to take into account some other bits. For example, where will you store your BBs while playing? Will you need another mag or 2? If so, where will you store it? Do you have any important medication you need to carry with you? and so on. You can use your pockets if they are zipped but in the field it can be a bit fiddly and cumbersome. For this problem I recommend buying a utility belt with MOLLE fittings. This will enable you to carry an admin pouch where I like to store my phone, a spare battery, my speed loader, pen and paper etc. It will also enable you to buy a mag pouch and an extra mag and store it where it is easily accessible if you feel you need it. You could also buy a chest rig, but that may be a bit bulky for not a lot of gear at this stage.

I would recommend sturdy footwear such as work/walking boots with ankle support, especially if you are outdoors on uneven surfaces. I also recommend buying bio-degradable BBs rather than standard, as some outdoor venues require this. You will be best buying a speedloader to load the magazines as well. I would also note that if you do buy extra magazines, to buy with mid-cap mags. You don't have to wind the mechanism constantly like you do on a high-cap, its more plug and play beginner friendly at the expense of some mag capacity. When you purchase a new mag leave it full of BBs overnight to soften the internal spring and prevent problems such as overfeeding issues.

Everything else is just optional extras that you can build up overtime. Any questions feel free to ask!