I am not good writing in English, but I need to send informal cover letter. Can someone help me with the grammar or maybe vocabulary, that can make this letter easy to understand yet sophisticated

. Thank you in advance
Hi xxx,
I would like to give more detail to my resume that I sent to you earlier.
I have been moving around since I got married in 1998. I managed to get my MBA during my first pregnancy and became stay at home mom since then. I have two kids at age 10 and 7 now.
During those years, I have remain active to a lot of organizations in the city that I lived in.
Now, my husband who works for xxxx, is working permanently in Singapore. The things that crossed my mind are Singapore is a country that has tons of opportunities, I can work 8 to 5 (no traffic jam) and good time to go back to work, since the kids are independent.
Looking at the resume, I might not an obvious fit to your company but I am very good at organizing things, quick learner, efficient and easy to socialize. I can do the work and make valuable things in your Singapore office.
That so much I can tell you about me right now and looking forward to meet you.
my name