Hi Jacqueline, and welcome to planDisney! Thank you for your question, you've got friends in us over here on the Panel!
Jacqueline, you absolutely can purchase tickets at the
ticket booths located in the front of the theme park entrances to Disneyland Park and Disney's California Adventure Park. However, I strongly suggest that you purchase your tickets ahead of time because you will have to make reservations for the parks in order to enter them. I suggest buying your tickets online, on your
Disneyland Mobile app, or by calling the
Tickets office at (714) 781-4636. Theme park reservations can be made up to 120 days in advance, which is great because you have a higher chance of selecting the parks in the order you want to visit on the days you are there. And reservations come and go, so the earlier you are able to reserve the dates, the better chance you have of getting what you want!
Jacqueline, I hope all of this information helps you today, and have a wonderful visit to the Happiest Place on Earth!
Frances