Suggest sources

Hello everyone! I'm an engineer student and I want to learn import export . Likely we've our textile business and I want to grow it more in international level need your help and guidance. First of all I'm totally a newbie in this field so will you suggest some good resources to learn this things and if you guys are comfortable to share some of your experiences and mistake which I should avoid in this journey then it'll be too much beneficiary. Thanking you 😊