So you have left your loved ones, no family, no friends, no spouse, no kids, no race, no caste, no country!
Next, you have to develop a specific to you kind of physical + emotional stress or pain, that should not be delipidating but consistent something that you start living with. You must develop a special relation with your peer Mars dwellers. They won't be friends but connected to you through destiny. Yes if you still haven't figured it out? Going to Mars is not just a technical or physically taxing journey but a very political & sociological contortion of whatever that is stopping us on Earth to continue to live with our way! Changing Earth is impossible, that's all we have given up to get our way and realize our human potential. Take 15-20 years to prepare because you have won a ticket to Mars! Not because you have money or you're the best, but because you are special and you broke Narus here.