Left my first review comment on a senior's PR and rewrote it four times before posting

Left my first actual review comment on a senior engineer's PR today — a real one, not just 'LGTM'. Wrote it, deleted it, rewrote it four times because I was terrified of sounding like I was correcting someone with a decade more experience than me. He thanked me and fixed it in ten minutes. The fear was worse than the actual conversation, as usual.