So here's the thing-
I'm trying to connect an Arduino to a character lcd and make a keyboard using some push buttons to make something like a hand held digital type writer that can make notes,open old ones and, delete unwanted ones. I'm a complete newbie to the Arduino so I'll need everything such as code and build instructions so please help me out a bit.
That is quite a difficult project for a beginner.
You need lots of push switches or a keyboard. An SD card to store stuff in, and an LCD display which is the least of your worries.
I suggest getting a bit of insight in how to program first by going through some examples in the IDE.
You are in danger of sounding like you are expecting all the work to be done for you. I hope that's not true in your case, but a lot of newbies come here with that expectation, so people on this forum are always wary of that.
Size and battery power will be key with your project, so I would suggest the following.
Arduino: Pro Micro 3.3V 8MHz. A little less simple than an Uno for a beginner, but smaller, breadboard compatible for prototyping and better for battery powered projects.
Battery: 3 X AAA or AA holder
Screen: a 16 X 2 or maybe 20 X 4 character display. Try to find one that is "transflective" and can be read in daylight without the backlight on, but also has a backlight for night use. Needs to be 3.3V compatible. Another possibility to consider is a "Nokia" display that is sold for use with Arduino.
Storage: micro-sd card adaptor.
Keyboard: here I have a radical idea! How about a "Chorded Keyboard"? I mean Chorded (as in musical chord), not corded (attached with a wire). Like the "Microwriter" from the 1980s. Only 6 buttons, but you type letters by pressing combinations of keys, like playing a musical chord.
Before you buy anything, post a link here so we can check suitability for you.
If the purpose is to make a tool that can store and retrieve useful notes then I reckon a RaspberryPi would be a much better starting point. It should be able to use a touch screen as a keyboard and it has the computing power to work with text.
On the other hand if it is just a demo of how to squash a quart into a pint pot and will never be used for real work then doing it on an Arduino might be fun. As @Grumpy-Mike has said, there is a lot of learning ahead of you.
...R
Oh well, I'll look into something easier then. Bit thanks allot for the guidance everyone