Where can i find aircraft blueprints for study purpose?
Fifteen euros gets you what you need here: https://www.the-blueprints.com/vectordrawings/show/1750/embraer_190/

This one is six euros: http://www.lulu.com/shop/elodie-roux/3-view-drawing-plan-3-vues-embraer-190/ebook/product-20233147.html