HTML5/Bootstrap 4 Teacher Wanted Hourly rates - I have basic Bootstrap skills wish to take it to next level

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HTML5/Bootstrap 4 Teacher Wanted Hourly rates - (I have basic Bootstrap skills wish to take it to next level)
Better understanding of resizing using a combination of CSS2/3 and Bootstrap/ Javascript / JQuery in DOM. Example properly resize row column grid vertically - While I have it working for width I do not for vertical(Height) of rows. Plan to use @media(min-height) {...} media queries to better get a handle on resizing such grids of (gallery pictures and overlaying checkboxes(z-index: higervalue so as to super impose) either using css e.g no javascript and jquery methods to pull element location info and super impose checkboxes of a form to select images. That was one issue I have yet to solve.
Basically I need to take my bootstrap knowledge to the next level.
Skills:
JavaScript
, jQuery / Prototype
, HTML5
, Bootstrap
, CSS3

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