Hi @mkapadia, welcome to the forum and THS community.
This is an excellent opportunity to get sits if you are willing to sit during the holidays. There are lots of last minute sits.
If you only have experience sitting cats, it’s probably better to apply for cat sits.
Local sits are sometimes easier to get, especially if you’re willing to meet the pets and owners in advance.
You can apply for as many sits as you want. An application is not a commitment.
It is important to read listings very thoroughly and refer to relevant information about the pets and responsibilities in your application, you have to show that you meet the requirements.
There are threads with specific advice about applications. I found this: The perfect application
You can also link your profile and you will get some advice on how to improve it, if you want.
Good luck