Trust me: looking down as you kneel to one knee requires a calm and slow tempo upon the priest - and he will see you and take notice that you desire to recieve kneeling. My little toddler boys kneel to one knee and wait to recieve their blessing and they have no problems.
As for both species: I proceed to the head of line, genuflect calmly and completely, and then stand to receive the Holy Blood.
I have found that if you practice doing this calmly, slowly and confidently, you will soon see how easy it is to do this with no problems and how your calm presence will influence the tempo and clam of those offering the Eucharist to you. In other words, if we are hesitant and nervous, the experience will not be pleasant and it will be awkward; if you are calm and confident, you will have a good experience. I know, as it took me a few months to become calm and confident and I have no problems no matter where I go.
It helps to do this consistently in your own parish where those in the parish can grow accustomed to your preference, too.
And remember, it is your Vatican-approved right to kneel to recieve - and the Vatican has warned pastors that you cannot be considered disobedient for doing so (and also told pastors that they can be disciplined if they do label you as disobedient for kneeling).