Begin (or start ?)

Hi all! Yesterday, I decided for me, that I would learn English and now I i need to practice. practical in English
But, I have one little problem - I have a small word lexicon and I am not good with English verb tenses (?)   bad orientate in time verbs in English
My grammar knowledge equals zero =). 
I need English for my job. so now i'm I know some words ,  that are related to the in technical sphere  field (IT field ?).

Hi Stanislav,

if I understood correctly, your question here is when do we use begin and when start.

Well, I would urge you, since you do have internet access, to use online dictionaries and Thesaurus (for synonyms, antonyms, etc).

Have a look here for an initial explanation on begin vs start:

https://dictionary.cambridge.org/grammar/british-grammar/begin-or-start

Other online sources you can use are the following:

www.wordreference.com  ( http://forum.wordreference.com/threads/begin-vs-start.19220/ )

http://www.collinsdictionary.com/dictionary/english

https://www.oxforddictionaries.com/

Good luck with your english language learning!