I have a job that makes me to be too busy and whenever I close from work I feel so tired, and I don't even have the energy to login my forum account. The only time I'm free is on weekends and my family is large, if even you want to do something else you may get distracted.
I want to know how you use the forum. Can you engage in forum discussion when you are in the midst of people that your attention can be called at anytime. Or you use the forum when you are free alone, like in the midnight when every where is quiet.
Because I know some forum discussion needs critical thinking and if you are distracted it can decline the quality of your discussion.
I'm very sure that during your work hours you still find time to check through your social media channels most likely WhatsApp, the reason you may be finding it difficult to engage in the forum while engaging in some other not very serious activities or in the midst of other discussions with other people is because you consider the forum to be a job and perhaps a place to be all professional and conscious of yourself. While that is true, the forum needs you to be original, unique, and freely express yourself. When you start seeing the forum like that, a place to freely express yourself like you do on your socials, being active will come naturally, and not feel like a difficult thing.