Hello there, you don't need a lawyer the main thing to do is to print all the application including the checklist documents and also check the website for additional forms which you will need because of the country they live which is Nigeria. Follow step by step and do not miss any document and keep in mind that if you cannot provide a document they are asking for you should add an explanation letter "formal" explaining why you can't add the certain document.. Good luck and welcome to the forum! Remember the best thing is to print everything and have it in hand than you start putting everything together and filling out the forms with pencil and add notes to keep an order then when ready fill it put by computer, follow the instructions then print in sing again