first run today!

hi everyone! i really want to become a runner for the physical and mental benefits. i ran with my boyfriend for the first time today and it went better than i thought! i ran until i felt my body needed to stop, then walked until i felt strong to run again and did that for 2 miles. i would love any tips and advice on how to improve, prep, and stay motivated for running! i am excited for this challenge because i think runners are so strong it blows my mind how people can do marathons!! so cool! so yeah i would love any and all advice for building up that endurance and becoming a better and stronger runner :))