بسم الله الرحمن الرحيم
(Fatwa: 1086/848/B=1434)
A person who regularly offers fardh, wajib and sunnah acts and invites his friends towards religion he is pious and shall go to Jannah, in-shaAllah. It is not fardh or wajib to go into jamah; rather it is a mustahab practice. If someone does not go to jamah he shall not be accountable for the same. However, by going in jamah one shall get the experience to work among the people, one develops self-denial. One develops the habit to offer salah regularly and to wake for tahajjud. Also one learns many things while attending the meeting of talim etc.
Allah knows Best!
Darul Ifta,
Darul Uloom Deoband