Welcome to the forum. Be sure to scan through the topics in our Index of Key Forum Threads, and the Cigarette section of the WLT Wiki. Both are linked in the menu bar. In general, specific tobacco ingredients (e.g. leaf varieties) are closely-held, proprietary information that is usually not available to the public. Also, commercial cigarettes add significant flavorants (anybody's guess).
Some Canadian-style cigarettes are entirely Virginia flue-cured. Most cigarettes, however, are a blend of Virginias, Burley and/or dark air-cured, and some Oriental. American-style and Italian cigarettes usually use burley, whereas German, French, etc. cigarettes utilize dark air-cured or dark fire-cured for adding strength.
Conceptually, the color of leaf from any variety of tobacco starts lighter at the bottom of the tobacco stalk, and progresses to darker colors toward the top. Leaf is thinner at the bottom of the stalk, and thickest at the top of the stalk. Similarly, the flavor intensity and nicotine strength (alkaloid content) increases from leaf at the bottom of the stalk to leaf at the top.
All commercial "Virginia" tobacco used in cigarettes is flue-cured, and is collectively known as "bright tobacco". Bottom leaf is sometimes sold as "thin". Next up the stalk is "Virginia lemon", then "Virginia bright", then "Virginia orange", and finally "Virginia Red".
For starters, begin your trials (Yes, you'll have to experiment.) with 100% Virginia orange. Then adjust its strength (if desired) by adding some burley or dark-air-cured (between 10 and 40%). To add a more floral note, 5 to 20% Oriental can be tried.
Good luck on your efforts, and keep us posted on your progress.
Bob