Cool down before reapplying after being rejected from Google

I have a first phone screening with a recruiter from Google coming up. But I already know I won't be able to prepare enough for the technical interviews in the next few months. (I hadn't expected such

I have a first phone screening with a recruiter from Google coming up. But I already know I won't be able to prepare enough for the technical interviews in the next few months. (I hadn't expected such a quick reply from them.) I'm fairly confident that I'd be able to get to a good enough level to have it be down to luck by summer. Should I just go for it and do it for the experience, expecting to reapply in the summer or is there some sort of cool down or maximum number of tries one has to adhere to? Would you just be honest with the recruiter and say that their reply came to fast and you'd need more time to prepare?