When the people around you did not come with you
God records the moment a person believes. The Qur'an describes people hearing what was sent down to the Messenger, their eyes filling at what they recognize in it, and asking for exactly that: "Our Lord, we believe — so write us down among the witnesses." Recognition of that kind is its own event, and it stands whatever the following months look like. What tends to follow is quieter than anyone warns you about: a family group chat you have stopped opening, old friends who have run out of things to say to you, a mosque where everyone already seems to know each other.
The Qur'an treats that cost as part of what happens, and it says so before you can ask. People are asked whether they expected to be "left alone to say, 'We believe,' without being tested". The testing arrives in ordinary form, mostly as absence: the empty seat beside you at iftar, the phone that stays quiet on the day you needed it.
The hardest version is usually family. Parents who read it as a verdict on them, siblings who call it a phase, a mother who cries every Eid. Guidance on this exact case is unusually specific, and it asks two things at once: hold your ground on what you believe, and "keep them honorable company in this world". Both are commanded together, so the strain of carrying both at once is not evidence you are handling it badly. What any particular decision in your own family should be belongs to someone who knows your life, not to a page.
A large part of the Qur'an belongs to people who lost a home for this and were given another. Its language is migration, and it reaches past geography to anyone who has walked out of a life they cannot walk back into. What is promised to them lands in this world as much as the next: places of refuge and abundance, being settled well after being wronged, and an earth described as vast for anyone who has run out of room where they are.
Friendship does arrive, and scripture puts its arrival in God's hands. Hearts are joined by him, and everything on earth spent on the task could not do it. That is worth knowing on the evenings when your own effort is plainly getting nowhere. A duty also sits on the room you are walking into: anyone who calls on their Lord morning and evening is not to be turned away, and a community that does it anyway has been told in advance what that makes them.
Take these a few at a time. If what you are carrying is a more general kind of alone, the verses on loneliness sit closer to it; if the difficulty is the people you love who did not come with you, there is friendship with non-Muslims.