Do you dislike/avoid playing support?
Me too. A lot of people feel the same way. You are not alone
Unfortunately this is a bad thing, because it means that sometimes you have to play support even though you don't want to, and you're probably pretty bad at it. (I know I am). However, for those times that you do play support, please understand that picking a high skillcap or hard engage support is probably a terrible idea.
I like to ADC a lot. Mid is still my favorite role, but ADC is a close second. Unfortunately, I often get plagued by bad supports due to people who are very much like myself, and simply got unlucky in champion select and forced into the role. However I'm here to tell you that it's okay if you are bad at support, on the major condition that you pick champions that you are comfortable with. The following is a list of champions that you should not play.

So why not these champions? Well, the answer is pretty complex and varies based on the champion, but the main idea is that all of the above champions have very specific interactions in the lane phase, midgame, and lategame that make them very difficult to play. You have to know exactly how and where to position at all times or you will simply ruin the game for your team. The leona/alistar that engages every time someone is in range, the blitz that hooks the tank or assassin into his carries, the bard that ults his own team, the thresh that provides no lane pressure and never uses his flay autos. These things ruin games.
Instead of playing one of the above champions and likely having a very volatile game, you should try the following champions which are safe, strong, and easy picks!

So what makes the above champions so good? Glad you asked! They all support a passive/peeling playstyle which allows your ADC to be aggressive and carry the lane for you. Remember, you're the novice in your lane. Let your ADC take the wheel and show you what to do. Stand by their side at all times and keep them safe and you're sure to have an improved experience as support.
So TL;DR -
If you aren't good at supporting, or if you don't like supporting and therefore lack experience - try to pick protection supports rather than playmaking supports. Playmaking supports are forced to be aggressive in lane - it's how their lane phase works. In the hands of an inexperienced player this generally turns sour very quickly.
PS: I intentionally left out a few supports like Annie, Karma, and Zyra. Annie is a strong aggressive support but I don't think she's necessarily a bad choice for an inexperienced support player, as long as you understand how to play Annie. Karma and Zyra are both poke mages that do really well in lane if you have specific knowledge on those champions, but they're less popular so people generally don't play them unless they know the champion anyways =P
- He can do a lot for a team, and is pretty beefy and can cause 2v2 fights to be won with his kit pretty easily compared to some tanks that take a biiit more skill to pull off.
She is easy. That's about all there is to it. She is squishy, but just poke and heal and use your ult when fights start. If you aren't comfortable, let someone else engage, and your ult will just stop an enemy from fighting instantly, and make it much easier to hit in the fight instead of trying to start the fight (unless you have no good engage, then maybe should have picked Naut).
. It heals, it breaks CC like a targeted QSS, and while it has no offensive stats, all the ones it has are super helpful for you as a support.
, unless they insist on getting it.
. these are legit good items, and they seem odd to a non-support, but trust me, when your job is support the team, and not only kill the enemy, you will start looking at these items in a whole other light. If you have to build selfish, I would almost always suggest
. Getting a deathcap on a support is borderline silly, and expensive to boot.