Hi so i've been trying to learn this game, got a few extra horses with the PPP for eventing but my question is as a newbie in this showing business should i keep the SSS Warmblood Stallion & Mare the game starts me with or am i better off selling them for more cash flow?

Your starting horses are "only" SSS - but those can make awesome show horses once they have more than 4-6 training sessions.
Most times they train up almost as fast as PPPs but stay in the money for a longer time before they will level up.

You will not get more than 1000 ebs for them ( as much as the FR pays ) if you want to sell them. But they can make you up to 250k in show earnings until they will pass away.

So its all up to you if you want to keep or sell or FR them :D
There are so many ways how you can play HEE and each one is ok!

I Was going to say something familar x. But when it comes to showing it doesnt really matter as i used to have a ASS Warmblood around 9 months ago and still got quite high scores in eventing. But the levels are just levels really, like they would be competing in real life.

thank you! I'll go with my slow and steady approach then and just train the horse i've got for a few weeks :)