If you don't have a portfolio yet, consider building a balanced diverse portfolio (ie figure out your risk tolerance and buy funds in that proportion) with these bonds as a component, rather than building a portfolio with only one security.
For instance, rather than 10k of Tesla bonds, you might do something like 5k in a 500-index fund, 3k in a bond market index fund, and 2k in Tesla bonds.
Or even better, $0 in Tesla bonds directly. An individual investor should probably not have any company specific bonds as the default risk for a single bond is too high. If you really want junk bonds, the better choice would be a position in a junk bond ETF (HYG or something).
For instance, rather than 10k of Tesla bonds, you might do something like 5k in a 500-index fund, 3k in a bond market index fund, and 2k in Tesla bonds.