I've heard people say they do real-life drawings before attempting manga but any pointers would be helpful.
I think people mean that you need to learn drawing by studying real life. Most mangaka/artist learned drawing by studying real life.
The best way to increase your drawing ability is by staring with the fundamentals. Drawing lines exercises to improve your hand-eye coordination. Then basic shapes, spheres, cones, boxes to better understand 3d space. Then shading and light, because like is what makes us see 3d shapes.
After you get the fundamentals down. Time to start studying the human anatomy.
I recently decided to write my own stories myself. And its much harder for me than drawing. But I really love the storytelling.
I'll talk about the drawing side.
You decided to start drawing your own manga?
A good way to start is by drawing 5 to 20 pages just to see if drawing pages is something you going to be interested in for the long run. Getting your hands wet, see how it feel.
Your first work is not going to look great, don't let that discourage you. No one just picks up the pen for the first time and start drawing masterpieces. It takes time.
I hope I'm not sounding harsh. I wish someone told me this stuff back then.
Drawing it digitally or traditionally or a mix of the two?
Digitally is drawing with a graphics tablet and drawing software.
Traditionally is the good old fashion way with a pen and papers.
Because you just starting I don't recommend digital, it need adjust and getting used to the tablet. You should consider buying a tablet later if you want to keep doing art. Tablets are great for editing and cleaning your artwork digitally. Let's stick to traditionally for now.
Drawing pages traditionally.
All you need is pencils and copy papers really.
If you want the full experience of drawing pages and have extra money to spend. Let's go on a shopping spree, shall we?
Copy paper $9
Use for scribbling and doodling, even for you storyboard planning.
Deleter Paper $11
Use for the finished pages. You can use the copy paper but it can't withstand inking, and the more you work on it it will get crumbled.
Sketchbooks $5 to $10
Not important. Just fun to have.
Pens
Pencils $3 to $6
You can go with the pen/Nib Set $7 to $10
This is the type you dip in ink.
Ink pens $2 for one, $20 for a set.
Black/white ink for $14
Ruler $1 to $5
Digitally. Even if we are not doing it digitally. I just want to cover it and talk about it a little.
For digital art you need
Wacom Intuos $75
It's good for beginning digital artists. But, some people have a hard time using it because they are not used to drawing on it while looking at the monitor.
There are tablets that you can draw on directly. Prices range from $400, $800 to $3000.
Drawing programs like CLIP STUDIO PAINT, Manga Studio, Photoshop.
There are free programs, I'm not sure if Sai Tool is free. Also, some tablets come with drawing program so watch out for that.
Again we are doing it traditionally so you don't need the digital stuff right away.
You don't have to buy everything. It's just the what you might need for drawing pages traditionally.
The prices may vary, so look around for good deals
I recommend getting some books like
Making Comics by Scott McCloud of the clan McCloud $20
How To Draw Manga Getting Started
It will teach you the basics of how to use the tools. But it's not about how to draw faces, bodies and such. for that maybe check more books of the series like, How to draw manga. Vol. II. Compiling Techniques.
Five volumes of Sketching Manga-Style are good but expensive.
Don't forget there is much good info on the net,
For now, don't worry about having correct anatomy. Just enjoy making your first manga.