Can I apply for a 1-year family visa from inside Thailand or do I need to do it from outside?

Still married to the Thai father?

So you have a daughter who has Thai nationality? You may be able to apply for in-country Non-O supporting a Thai Child if your current stamp still remains 15 days or more (21 days or more in Chiang Mai and a few other provinces) as of the application date.

Go to your local immigration office to get the latest handout. The link might be similar, but you as a foreign mother, requirements might be different.

You need to apply for an in-country Non-O visa for 90days first, this doesn't require you to have your funds for a minimum period. When your new stamp remains less than days, you (finally) apply for a 1-year extension. For 1 year extension, you need to have your funds in a Thai Bank account for a certain period.

/7.CHILDREN-OF-THAI-NATIONALITY-NON-O.pdf

I let it into the group, BUT there is NO 1 year family visa.

I guess you like to convert your stay based on being family of your daughter but that all depends on the reasons and issued stay of your daughter.

Without basic information it is impossible to tell if you can apply, visit your local Immigration Office with your daughter, both passports and tell them what you like to do.