Cattleya jungle beau in very tight sphagnum moss

[Miri the Wildmage]

Hi everyone! I've just bought my first Cattleya (I've grown Epidendrums before though) from orchid garden UK and it looks like a terrifically happy little plant! Plump pseudobulbs, healthy roots, got its first bifoliate growth and maybe even a sheath coming? Also two new growths, no new roots from them yet though. However, it came potted in pure sphag, not broken down but very tightly packed, and the thought of a Cattleya trying to breathe and push new roots down into that is making me wince. Pictures are attached, I'm in two minds about whether to repot as soon as I see new roots on the new growths or wait until next year when it'll have a couple more mature psbs to fall back on - he's such a little guy! I don't want to mess up because I'm so excited to see blooms from this one, but although it has a seemingly mature growth with even signs of a sheath forming, it's no bigger than my hand and I've got small hands! I've heard bifoliate catts HATE repotting so I don't wanna mess up. What do people think? Repot sooner or later, and what into?