Wa Alaikum As Salaam Wa Rahmatullahi Ta'Ala Wa Barakatuhu,
The first thing you have to do is ask Allah to guide you and aid you in the path to increase your Iman, and to remove the obstacles (both external and internal) that prevent you from that goal.
I don't know anything about where you live, but my general advice is you just have to make time - make it a priority. (I knew this family that used to make a 45 minute drive to masjid every Jumah!) Maybe on the weekends you can go to the masjid. If it is an active community, they might have programs and you can meet other Muslims. Make sure it is a positive environment, though. Some communities have so much drama they can drain your Iman.
If that is just not feasible, then maybe try planning to attend an Islamic conference/workshop if they are held in your region. They can be great for Iman building and meeting other Muslims.
Another resource of course is the internet. There are tons of motivating lectures and articles that help with increasing your Iman.
May Allah help you increase your Iman