I did a little video on how to use and what value a croquis can be. The most important thing to remember is that this is a process and as such it is ongoing. IOW, do NOT expect to get the design right the first time. The idea is to try out different aspects of the design to see if they will work.
For other markings, if you want to place a contrasting colored sticky on your bust points, and tie a contrasting ribbon around your waist (in a bow in back so it’s not distracting in front), then you have most of your markings you need. For your hips, just measure across the widest part. If you want to leave one arm out (like with your hand on your waist), that’s OK for one shot, to help you determine where your underarm is, and same is true of your inseam height, but don’t use these positions as croquis at first, because this can distort your true figure shape and make proportions harder than it needs to be. That should take care of any other markings you may need on your croquis.
Some of the supplies I used, but you don’t have to are: kneaded eraser (I like it cause usually I can squeeze it into a tiny shape and erase a little spot) graphite pencils (F, HB, B & 2B are my favorites) and the Bienfang sketch pad – it has a great tooth (will grab the graphite from the pencil nicely) and it’s somewhat transparent, but a nice weight. You don’t have to use these, but get some nice soft pencils – it makes drawing wonderful.
Don’t make this hard. Play with it and have fun with it, and this process can go a long way toward helping you make good decisions about the proportion of your sewing.
As always I adore questions….hopefully this will help you, and most of all, I hope you will make your own croquis and then use it and experiment with it to see how useful they can be.