Humans, after all, have limited energy. It is difficult to practice one kind of boxing well in a lifetime, let alone two kinds.
Taijiquan and Baguazhang are both very connotative. Just learn one well.
Many masters have also learned several kinds of boxing, but from their experiences, it can be seen that they first worked hard to learn one kind of boxing, and then by chance met famous masters of other boxings, and then learned other boxings.
When learning boxing, it depends on what you like. If you don’t like it, don’t learn it. From your question, it seems that you like both.
Secondly, look at fate. Although it is said that "the master leads you in, and the practice is up to you", it is always better to follow a famous master, so you need to check out what your local Tai Chi and Baguazhang masters are like, and what the conditions are. Under the premise of permission, try to choose the best master. Then when the master practices Tai Chi, you can practice Tai Chi. When the master practices Ba Ba, you can practice Ba Ba.
To learn kung fu, master and apprentice choose each other. The apprentice first chooses the master, and the master then examines the apprentice. Only when both parties are satisfied will they officially become their disciples.
Choosing a master is the first step in learning kung fu. It is very important and requires some thought. The process of finding a good master can also be regarded as testing your comprehensive ability.