To honest mate, when your a beginner i find being consistent better than being able to do one mega fast time, if you can consistently post time with 1 second or so of each other you should be OK.
I was on last night doing a few races and i was almost always in the top 8 out of about 18 people, inclusing two 3rds, im not the fastest racer, i was a good 1 or 2 seconds off the fastest lap, but i can usually set similar times over and over again, making for a solid race. No matter where you race, as long as its not a server for pros, you will always have someone to race, you wont be the only one that is slow on track. As long as you drive safely, and obey the blue flags etc and race sensibly you should be fine. people dont kick slow drivers usually, they kick you if you drive like an idiot and wreck other peoples races.