I don't know your current age, OP, but my two cents:
Buy only what you like. I think showing genuine interest in the house and what they offer will get you much farther than buying things left and right in the hopes of being offered a kelly or birkin. Some people spend at least $5k or $10k before they are offered a bag. Others only buy three scarves and then get an offer. Some people say certain items don't count toward the quota, like leather goods (bags and wallets). Obviously, it would be pushy of you to ask a salesperson how you can be considered for a kelly/birkin.
Another reason to buy what you like: Hermes return policy is 14 days and store credit, or at least in the US. Start with a twilly or twillon to familarize yourself with the brand.
As for bags, my dream bag is actually the cinhetic (box) bag. I think what sets Hermes apart is their use of clear/pure colors. Sure there are some muted colors thrown in there, but not many luxury brands are producing vivid colors for bags and wallets. Chanel produces some bright colors but I don't find them as showstopping as Hermes... You really have to see it in person to fully appreciate the colors.