Perfect bro thats all u gotta do. Afgani grows very tight and just like tour thumbnail that u posted they grow stocky, tight little buggers. A little secrecy u can do is now that u just topped move the light further away from the plant for a few days so it streaches for the light. It still will b a tight plant theres nothing u can do about genetics but your stalks will stretch a little then u can bend and tie those at a 90 and crest more budsites on a longer stalk. Once you flip to 12/12 u will experence a period for 3-6 weeks of stretch. The only reason I say 3-6 is because you never know how long the streatch will last(genetics) can't control that. Everything is looking good h and just remember that during flower your plant will double maybe tripple in size so keep that in mind bro. I know u have the height so your straight. I'm still here bro I got u set up as a app.on my iPhone ! LOL peace bro and good luck to ya!