If you are a PC gaming beginner and just starting out in online games then I would strongly suggest that you first try a free trial of online games so that you can determine if the game is good for you. Some websites have games for the novice and also a few that are aimed at the more experienced PC gamers who want to jump right in. You will be able to see what type of games you enjoy playing, but you might want to go with a free trial for your first few games so that you can try them out on a PC before you actually spend any money to buy them. Once you get used to playing the games on a PC and get the hang of them then you will probably want to purchase them.
When looking for a new game to play on a computer screen, you may want to do some research online before buying the game. This way you will be able to see if there are any reviews of the game or what kind of problems people have had with playing the game, so that you know what you are getting into before you even start playing the game. It is always best to stick with a game you know you would like to play and not play something just because it is new.
In conclusion, if you are PC gaming for beginners I would highly recommend that you start a free trial of online games first so that you can get the hang of playing the game before you buy it. This way you will be able to determine if the game is good for you and what you like best.