There is no normal being that loves getting losses on business, career, investment and trades that's why even company holders make financial policies to keep record of investment and profits flows. And unlike other business bitcoin also makes sales and losses if you do not investment wisely....is nice when you put in what can not put you sickbed or gives you hypertension, don't invest out of what you cannot withstand the loss.
Is better to use small money or learn risk management first before investing especially newbies.
You sound like there's actually anything like 'spare' money perhaps you don't make errors! Everyone who invest by trading in Bitcoin has capacities in which they can and nothing could be spare or small at some point due to difference in financial capacity of persons. Better you advice that don't hurry into Bitcoin investment without understanding the best time to buy any fraction of it!
For the risk management you're talking about... don't you think it will cost you time and money if you really want to study risk management you could take online courses too for that and not all are free. If the intention of the person is for long term trading rather than waste time studying risk management...after all it's not like we're managing money here it is better you said learn from experienced traders and know how to maintain if necessary little dip while you're still heads above water in the case of dip in the coin that when it' bulls again you'll have gotten enough gains!
Don't be afraid of taking risk just don't be insensitive to trends that has been existing in Bitcoin before investing in it!