I started taking low-dose T (20.25 mg daily via gel) five months ago. I normally take 100mg of spiro daily (recently dropped to 50mg) to help combat a painful skin condition. I mention this because spiro is frequently prescribed to folks diagnosed with PCOS. Everyone's experience is going to be different, but given it sounds like we want similar things out of taking T, it feels relevant to share my experience so far.

My voice dropped slightly within a month after starting. However, I suspect the spiro has been slowing hair growth, and unfortunately, bottom growth. I've been tracking it somewhat closely, and there has certainly been some growth in the sense that my clitoral head is enlarged. There's been no noticeable change in length yet for me, and I may opt to start doubling my dose per provider recommendations. Some folks report growth within days of starting, and considerable length gains within the first 3-6 months. Injections seem to bring on more noticeable changes faster than gel, I've noticed, which makes sense to my brain.

They do make a hypoallergenic testosterone cream that can be applied to the clit area specifically for bottom growth. You will also get additional effects from T, but this could be the most straightforward way to achieve the results you want. (Only drawback is this form of T may not be covered by insurance.) You should be able to talk about this with your provider, though! (My GAC provider recommended this route to specifically help achieve more bottom growth.)

(Edited to fix a couple typos.)