What was Biddy going to do after Mrs Gargery's death?

From the text:

“Oh! I can't do so, Mr. Pip,” said Biddy, in a tone of regret but still of quiet conviction. “I have been speaking to Mrs. Hubble, and I am going to her to-morrow. I hope we shall be able to take some care of Mr. Gargery, together, until he settles down.”

“How are you going to live, Biddy? If you want any mo—”

“How am I going to live?” repeated Biddy, striking in, with a momentary flush upon her face. “I'll tell you, Mr. Pip. I am going to try to get the place of mistress in the new school nearly finished here. I can be well recommended by all the neighbors, and I hope I can be industrious and patient, and teach myself while I teach others. You know, Mr. Pip,” pursued Biddy, with a smile, as she raised her eyes to my face, “the new schools are not like the old, but I learnt a good deal from you after that time, and have had time since then to improve.”