But in your first post, you mentioned that "Bitcoin investments in your country are not easy due to your currency value, and the government is not very supportive." So, if investing in Bitcoin is challenging in your country, how do you intend to buy bitcoins from your mother? Moreover, if your country does not support Bitcoin, it is unlikely that it's even legal for your mother to accept bitcoins as payment for her services.
If you have the funds, my suggestion would be to purchase BTC directly from a seller. It is best to respect your mother's wishes and not involve her in this service if she is not comfortable with it.