I'm finding it hard to practice CSS. I just don't know which typography, colors, sizes(...) to use. HELP!

Sounds more like you are struggling for inspiration. My suggestion would be to explore and see what's out there on the interwebs:

• Play around with colors using Adobe Color Wheel
• Check out some fonts online (eg fonts.com)
• See what other people have put together on portfolio sites (eg behance.net)

Hope this helps.

Have you taken the how to build a website course by Nick Pettit. If not I would recommend taking it you deal with mostly html but you also work with CSS as you build the web site you can branch out on your own with color and design and just experiment. If you've already taken the course then the hard part of writing the code is done and you can take what you already have and just play with it. Start with basics and just keep experimenting. There are also web sites that have the hex and rgb colors listed so you don't have to overwhelm your self with remembering everything. You can also reference the html and css index so again your not overwhelmed with trying to remember everything. There are a lot resources out there and once you start to experiment with all that you can do I think you'll feel a lot less overwhelmed.

Once you've played around with that a fun and simple way to practice is to make a blog. I personally don't blog and I wont ever use the one that I'm making, but it's a simple site to design and you can really go any direction with it. I love to cook so I'm making a site that I could "blog" about my latest recipe and I have an archive of all my recipes, an about me section, and links to other peoples recipes that I've found online. Again I'll never really use it but the point is to practice.

I hope that helps, let me know if you need more ideas!

You could always look at the responsive sites listed at http://mediaqueri.es/ for some inspiration.

You could also use a color wheel to see what colors work together http://www.sessions.edu/color-calculator

I think if you use bootstrap or foundation , it will teach you good html which will make it better as well if you make the design , and adjust it to mobile, it will teach you a lot as well. Then you should move out of it and do it without the framework. If you use it before, you will get better idea of how things work .

But you should deffinitely check out treehouse CSS courses like Rob Tuner said. Their really worth it. Its not hard, its just the matter of understanding. You can do it eaither the asy way, or either the better and harder way which at the end i think will be worth more but it will take also code more. But once you coded it one, you can re-use it anyways. But at the beggining dont reuse any code and just code it frmo your understanding and memory . Just look out fro hints or look on google for manuals instead on vidoe to see if you can find the answer your looking for. Try to focus on one thing specific . E.g this week im going to learn how to do a hamburger menu, and do that. Next week how to do a responsive feed fro small mobile,normal mobile,tablet, laptop, small desktop, medium desktop, and massive desktop. They are the same in a way but you should deffo check out iphone s4 as its small and look how it will look on something bigger like iphone 6 . As well as on tablet and different screen sizes. Have in mind 27inches imac . Things on it , looks smal but the screen its self is very wide , rectangular so yeah.

Hope this helped .

I'm having a problem with understanding sizes in html and css. I dont quite understand where I am starting from to make proper size assessments for pictures, banners, etc . For example if I want to place two separate pictures in my header how do I determine what size the photos should be, how much room I have in my header, how the pictures will be kept separate or place close together-when do I use pixels or em's...can any one recommend something that has been written on this or direct me something here in treehouse that will deal with my struggles with sizes?

Thanks for the helpful tips! Immensely appreciated!