I guess your first step will be to find your nearest airsoft venue or club and pop along to see what it's all about and ask questions. If you do make sure you have some good quality eye protection with you cause even if you are not intending to play you will be able to watch but only if you have eye pro on.
People will be very forthcoming about what you need to get started and you can book a game day and use a rental gun to get the feel for it.
It's a great sport/hobby but it can get expensive if you let it ?
Have a wander over to @GAMBLE's you tube channel for tips and advice. Nothing heavy just a down to earth insight into the game and what you will eventually need?
Have fun looking around the forum and chatting to other members.
Go along or call them to book a game day as a rental which means you will use their gun and bb's. Lunch may be included.
If its a woodland site then good boots with ankle support are recommended and of course,EYEPRO!
If I is an indoor cqb site then I would recommend no exposed skin!! Lol
You will have to play min of three games in not less than 56 days to qualify for a defense which will enable you to buy your own rifs otherwise you would have to buy two tone imitation firearms.
Would suggest decent eye pro, boots with ankle support and to go rental first and see if the sport is for you before buying any GEAR (and if you do, wait for your UKARA)
You'll be more than likely given an AEG to play with.
Most airsofters are approachable, will answer any of your queries and will normally let you take a plink with their gun.
Ps. Here a link to @GAMBLE channel as someone has forgotten to post it ?