Yes, I think online sermons are sufficient at this time for you. I agree about the importance of meeting and being friends with Christians, however due to your circumstances as you've expressed them I think it is also important 'as much as it depends on you, live at peace with everyone'. There are also passages about how if one person in a marriage becomes a Christian, and the nonbeliever will remain married the Christian also ought to remain 'because how do you know, believer, if you may save your husband/wife?" So I think remaining at peace with your family is consistant with your new walk with the Lord, because of your influence. Please see 1st Corinthians 7:12-24.
10 Now to the married I command, yet not I but the Lord: A wife is not to depart from her husband. 11 But even if she does depart, let her remain unmarried or be reconciled to her husband. And a husband is not to divorce his wife.
12 But to the rest I, not the Lord, say: If any brother has a wife who does not believe, and she is willing to live with him, let him not divorce her. 13 And a woman who has a husband who does not believe, if he is willing to live with her, let her not divorce him. 14 For the unbelieving husband is sanctified by the wife, and the unbelieving wife is sanctified by the husband; otherwise your children would be unclean, but now they are holy. 15 But if the unbeliever departs, let him depart; a brother or a sister is not under bondage in such cases. But God has called us to peace. 16 For how do you know, O wife, whether you will save your husband? Or how do you know, O husband, whether you will save your wife?
17 But as God has distributed to each one, as the Lord has called each one, so let him walk. And so I ordain in all the churches. 18 Was anyone called while circumcised? Let him not become uncircumcised. Was anyone called while uncircumcised? Let him not be circumcised. 19 Circumcision is nothing and uncircumcision is nothing, but keeping the commandments of God is what matters. 20 Let each one remain in the same calling in which he was called. 21 Were you called while a slave? Do not be concerned about it; but if you can be made free, rather use it. 22 For he who is called in the Lord while a slave is the Lord’s freedman. Likewise he who is called while free is Christ’s slave. 23 You were bought at a price; do not become slaves of men. 24 Brethren, let each one remain with God in that state in which he was called."
Yes, the Bible also says other things about forsaking family for the sake of Jesus and his call to a person, but I think these words need to taken very cautiously and seriously. Perhaps if you are not allowed to read the Bible at all, if your family was involved in clearly evil things, those things would be cause for considering parting with your family.
Otherwise, your private study and walk with the Lord, meeting causually with Christian friends, and your gentle and quiet life lived out in kindness and service to your husband and son I think are very valuable before God. (See 1st Peter 3:1-4) Also, your prayer for them and your prayer to God as to how to conduct yourself amongst them.
James 5:16 The effective, fervent prayer of a righteous man avails much.