Thanks! I have a AD1865 DAC, with a different tube in the output (directly heated 2J27 triode strapped). C2 is redundant in many situations; I usually have fixed grid bias when single ended so I just have it in the scheme.
The OP's situation is - though common - a bit difficult. He probably has a CD player with a line level opamp output, and a transistor amp that can go full power on a line level signal. So he basically doesn't need any gain at all.
However, the "line buffer" or preamp or whatever, is usually the first thing to DIY, to get a taste. It'll be completely redundant, but exciting to make, and learn.
Best case, the new DIYer will realise that tubes are not for 'sound' but for fidelity. This of course presupposes a lot of learning while making.