Boyfriend’s career and marriage

My boyfriend and I (both 25) have been dating for close to 3 years. Things are great, we are very compatible with each other, love each other deeply, share the same values and want to grow old together. By profession, he is in the merchant navy. Which means he is on ship for about 5 months of the year and rest he can spend at home (no professional responsibilities at all). Our parents know about us and we’ve spoken about marriage and we intend on tying the knot in a year. I have 0 apprehensions about marrying him, he is the love of my life but I don’t know how to handle him being in the merchant navy and marriage. While he will be earning very well, a lot of responsibility will be on me. It will initially start with our home and later come to our family where I will be practically raising our children alone for half the year. He will be missing a lot of important days in our lives, and might not even be present during emergencies (health wise, unprecedented situations). I am also concerned about my professional growth since I will practically be the only one taking care of basically everything when he’s at sea. In all honesty, I am not a very ambitious person. I come from a broken childhood and home. I’ve had a lot of trauma and stepping into my own home feels like a war zone. I have lost a lot of my developmental years to depression and trying to overcome battles that I never thought I could win. So for me having a stable happy home is I think what would make me the happiest. However I do want to be financially independent. Any ideas on how I can navigate this. What to expect, what not to expect? PS- the intent of this post to know your thoughts/experiences. I am not necessarily asking for solutions of any kind :)