Is this an original Russian handwrite?
Hi, I've found something like that. Is this the same handwrite the native-speakers use? https://ilrussian.files.wordpress.com/2009/12/script-practice-sheets.pdf https://lingualift.com/ru/files/docs/russian-writing-cursive.pdf
/If not, Do you know where should we find something helpful?
Yes, it is similar. The actual fonts used by handwriting workbooks look like this (note that this is an idealisation—people do not end up writing like this; besides, "е" breaks the smooth line when written this way):
However, yours are fine, too, for all practical purposes. Weeell... if you are going to make a film that is set in Russia, and kids there use Russian "propisi" to learn how to write—then, yes, it does not look authentic :). Google «прописи» if you need the 100% authentic look (for some reason).
Postscriptum: Съешь же ещё этих мягких французских булок, да выпей чаю (link number two) :DDD
Looks like the handwriting pages my Russian tutor gave me in school. :D Those were good times. It is a good idea to at least be familiar with reading Russian cursive if not writing it yourself. From what I have seen cursive is used a lot more frequently in Russian than in English (or so it seems).
I learned this lesson the hard way about a month ago! ;-) A Russian musician I love is coming to America next year and a date in Boston was announced on his Facebook page - using a poster with a lot of the necessary information written mostly in cursive! I had learned the Cyrillic alphabet, but only in print. Oops!