There are so many skills you can study and learn. Do not get overwhelmed. Take time to think about what career path you want to take and the career you really love doing. The reason you need to take these upgraded skill is for you to stand out. There are so many home-based VAs who are not earning enough because they do not have specialization because the clients are picking the VAs offering lower rates. The key to get out of that race is to offer a skill that is high-end, in demand, something you love with the goal of becoming a freelancer who is capable to provide value to client's businesses. These training lessons are paid, you need to pay around Php1,500/month to access all of these. But you can take advantage of the 30 days trial to start and get your certification. Choose the learning path you would like to take.
PS: I do not earn anything if you choose to continue your subscription with LinkedIn Learning after 30 days. I am paying LinkedIn myself to continue learning.