I was happy to be approved but the CL is very low (can spend over the limit so no major issue). How long before I should ask for a CLI?
Does the 61 day CLI apply even if you have personal cards?
Yes, as @CreditSweeper mentioned the rules for CLIs with AMEX apply to both personal and business cards. You can request an increase for a biz/personal card you opened 61 days after approval with the assumption you did NOT already request a CLI on another AMEX card you already have. At that point the 91/181 day rules apply: 91 days if your request is declined, 181 days if approved. AMEX considers all your cards one account and allows only one increase per account.