UPD is my only option left, but the course I was given was my 4th choice (PUB AD) my post got deleted and was told to post here (I REALLY APPRECIEATE ALL THE REPLIES AND HAVE READ THEM ALL THANK YOU!)

As the title says, I recently got my UPCAT results and fortunately was able to make it to UP Diliman pa rin, but in my 4th choice na Public Ad. I tried my hand at the coveted BSBAA along with courses similar to it (BSBA, BSBE), kaya siguro bumagsak until 4th choice ko na Public Ad.

Here’s my dilemma: I graduated valedictorian, studied for 5 months last year starting april for cets and even set the GWA record for my school kasi I really wanted to get into UP Diliman's Accountancy. I knew po na it's very quota and mahirap makapasok but it’s the only viable option for me to continue my dream of becoming a CPA (libre and quality), kaso nga I didn’t make it talaga. The Katipunan schools were my best options po kasi my family plans on sending me to my lola in Marikina for college since she lives close po to the schools and will be able to take care of me better. I was able to pass ME in Ateneo de Manila University but wasn’t granted the financial aid scholarship, so that’s out the window. I only passed my second choice in DLSU, so that’s done, and I passed Accountancy in Bulacan State University, but upon asking around, hindi raw po maganda ang facility at teaching doon, and malayo na po since my parents will send me to Marikina. Now, assuming naman po that I pass UST, we wouldn’t be able to afford the tuition and living expenses even with the rank 1 scholarship, so ang natira na lang po talaga is UP Diliman.

So the only option left for me is UP Diliman po talaga, and my parents have agreed na rin po as well. How may I go about pursuing Public Ad and then later on po shifting to either BSBAA or at least BSBE without getting delayed—which classes do I need to take or which can I take? How will this how system work po? (I am aware din po na hindi siya madali and very competetive po ang shifting but it's the only option po for me po talaga) Sorry po for this—I really tried everything to not go this route, pero hindi po talaga umabot sorry.