Personal Shopping vs Package Delivery

!! Hello all...Im signing up for Shipt right now from the Tucson, AZ market but its asking me to choose between doing Personal Shopping and Package Delivery....which one do people doing Shipt recommend most?

I wanted to know if its possible to change decision after I sign up or whether this decision is final is permanent

Also, the idea of Package Delivery sounds way more appealing to me, but I do not know if there is enough work in that to make it worth it and what people doing Shipt would generally suggest as the better option.....if anyone could give me some advice and let me know whether the choice is permanent once its made, I would really appreciate it! Thanks