Anchor your buoy out from your launching point, don't do swim thru's or start grabbing at stonefish- use your compass to navigate to and from the buoy(success in this task alone will put you ahead of the average go on a charter type diver) untill you know that area like a spearfisherman...I am guessing you have good skin diving experience, hence the confidence to go solo.
There is no law against it, nor should there be.
Padi and the other "for profit" orgs. have "rules" that suit their bottom line, mixed up with good safety ideas(mostly learned from solo divers back many decades ago). Really they would like you to only ever dive out of your LDS charter or their worldwide franchises, so they pump in the coin hard and garner more power with governments, they would love their rules to be law!!!!!!
From some of the certified people I've seen diving on charters and overseas, that idea isn't working to make divers more knowledgeable or experienced- practice under different situations and conditions makes better divers!
You should know what you can and can't do, if your being egotistical with your assessment it will become apparent in the water. One positive thing that solo diving gives is freedom to choice what you want to do and how you are doing it. Knowing the factors which you can't control and must still work with is the trick to mastering anything. The inward reflection while solo diving is quite spiritual for me and helps me think straight in day to day life.
Your life, your choice.
Safe diving,
Damo ps- I don't believe in trophies for coming last, it leads to a lowest common denominator mentality, some shouldn't and some can- the only thing you really need is the ability to see the truth who ever you are......YOU ARE YOU AND NOT ME!!!!!