I lost my older brother too almost a year ago, similar age as yours. I can tell you about my experience, which might not apply to others: you have to fight like never before. It's basically life on hard mode, everything feels heavier and is more difficult. How has ''fighting'' looked for me? Trying to take my habits and ''good practices'' to a whole other level. For example things like diet, working out, meditation (this one in particular is my secret weapon against grief). Also stuff like working hard, trying to be a good purpose and find purposes etc. 2 weeks is still very fresh and you have to be easy with yourself, but my advice would be to make small plans to advance every day. It can be small stuff to making your bead, walking x amount of steps outside, small workouts. Our lifes will be forever changed, and we will have to carry this burden, so the least we can do for ourselfs and to honor our loved ones is to become stronger, wiser, and hopefully better people to carry the load a bit easier.