I am not one to tell you what is best for you. As said before , are you looking for advice, or agreement in your choice. With no experience riding, the only guarantee with your choice is scratched up fairings. To start with an advanced sport bike may be a bigger bite than you may be ready to chew. Not all of us started on 250’s, but most of us started on smaller cc’s and advanced up as our skills and pockets allowed. Read other posts and glean information from there, once you have done the research, make your choice. Have an open mind, these are opinions based on experiences of all sorts. Above all take the MSF, if the 250’s they use present a problem, the YZF600R will be more than a handful. Ride safe and God bless. Jon D.