Sorry, but based on the starting position you've outlined no-one can give you any indication of :-
1. If it's possible
2. The processing time.
Your mother cannot donate any title (or part of any title) to you unless she is the legal holder of the title. Period.
You must identify legal title holder(s)
May I very kindly suggest you do some research.
Take a look at Republic Act No.386 - The Civil Code of the Philippines
Start at Article 960 and continue through to article 1014
Here you will find the information you need concerning:-
- Intestate Succession
- Partition and Distribution of the Estate
It sounds daunting, but it doesn't take too long to gain a good insight.
Good luck